10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549
FORM 10-Q
[ X ]	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended September 30, 2008
	OR
[ ]	TRANSITION REPORT PURSUANT TO SECTION13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from _________________ to _______________________
Commission file number: 000-22427
HESKA CORPORATION
(Exact name of registrant as specified in its charter)
Delaware		77-0192527
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification Number)
3760 Rocky Mountain Avenue Loveland, Colorado			80538
(Address of principal executive offices)		(Zip Code)
Registrant's telephone number, including area code: (970)493-7272
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes [ X ] No [ ]
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company as defined in Rule 12b-2 of the Exchange Act. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer [ ]			Accelerated filer [ X ]
Non-accelerated filer [ ](Do not check if a small reporting company)			Smaller reporting company [ ]
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes [ ]No [ X ]
The number of shares of the Registrant's Common Stock outstanding at November 7, 2008 was 51,818,663.

TABLE OF CONTENTS

		Page
PART I - FINANCIAL INFORMATION
Item 1.	Financial Statements:
	Condensed Consolidated Balance Sheets (Unaudited) as of December 31, 2007 and September 30, 2008	2
	Condensed Consolidated Statements of Operations (Unaudited) for the three months and nine months ended September 30, 2007 and 2008	3
	Condensed Consolidated Statements of Cash Flows (Unaudited) for the nine months ended September 30, 2007 and 2008	4
	Notes to Condensed Consolidated Financial Statements (Unaudited)	5
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	10
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	20
Item 4.	Controls and Procedures	21
PART II - OTHER INFORMATION
Item 1.	Legal Proceedings	22
Item 1A.	Risk Factors	22
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	32
Item 3.	Defaults Upon Senior Securities	32
Item 4.	Submission of Matters to a Vote of Security Holders	32
Item 5.	Other Information	32
Item 6.	Exhibits	33
Signatures		34

DRI-CHEM is a registered trademark of FUJIFILM Corporation. i-STAT is a registered trademark of Abbott Laboratories. SPOTCHEM is a trademark of Arkray, Inc. TRI-HEART is a registered trademark of Schering-Plough Animal Health Corporation ("SPAH") in the United States and is a trademark of Heska Corporation in other countries. HESKA, ALLERCEPT, AVERT,  E.R.D.-HEALTHSCREEN, E-SCREEN, FELINE ULTRANASAL, HEMATRUE, SOLO STEP, THYROMED and VET/OX are registered trademarks and CBC-DIFF, ERD, G2 DIGITAL and VET/IV are registered trademarks of Heska Corporation in the United States and/or other countries.This 10-Q also refers to trademarks and trade names of other organizations.

HESKA CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(dollars in thousands except per share amounts)

(unaudited)

ASSETS
	December 31, 2007				September 30, 2008
Current assets:
Cash and cash equivalents	$		5,524			$		5,434
Accounts receivable, net of allowance for doubtful accounts of $96 and $107, respectively			11,064					11,048
Inventories, net			16,395					15,033
Deferred tax asset, current			1,260					362
Other current assets			884					839
Total current assets			35,127					32,716
Property and equipment, net			10,669					9,401
Goodwill			834					856
Deferred tax asset, net of current portion			28,776					29,022
Other assets			185					185
Total assets	$		75,591			$		72,180
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable		$	5,653			$	5,907
Accrued liabilities			3,175				3,663
Current portion of deferred revenue			2,977				2,345
Line of credit			12,614				9,020
Current portion of long-term debt and capital leases			776				1,344
Total current liabilities			25,195				22,279
Long-term debt, net of current portion			1,151				—
Deferred revenue, net of current portion, and other			6,362				5,309
Total liabilities			32,708				27,588
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.001 par value, 25,000,000 shares authorized; none issued or outstanding			—						—
Common stock, $.001 par value, 75,000,000 shares authorized; 51,447,663 and 51,816,063 shares issued and outstanding, respectively			51						52
Additional paid-in capital			215,685						216,318
Accumulated other comprehensive income			335						393
Accumulated deficit			(173,188	)					(172,171	)
Total stockholders' equity			42,883						44,592
Total liabilities and stockholders' equity		$	75,591		$				72,180

See accompanying notes to condensed consolidated financial statements.

2

HESKA CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share amounts)

(unaudited)

	Three Months Ended September 30,					Nine Months Ended September 30,
	2007		2008			2007			2008
Revenue, net:
Product revenue, net:
Core companion animal health	$	15,601	$	18,944	$	48,828		$		53,623
Other vaccines, pharmaceuticals and products		3,399		2,426		12,262				11,581
Total product revenue, net		19,000		21,370		61,090				65,204
Research, development and other		491		316		1,203				1,015
Total revenue		19,491		21,686		62,293				66,219
Cost of revenue:
Cost of products sold		11,825		13,402		35,790				41,395
Cost of research, development and other		58		88		234				321
Total cost of revenue		11,883		13,490		36,024				41,716
Gross profit		7,608		8,196		26,269				24,503
Operating expenses:
Selling and marketing		3,795		4,458		12,172				14,024
Research and development		663		506		2,109				1,462
General and administrative		2,017		2,134		7,042				6,756
(Gain) on sale of assets		—		—		(47	)			—
Total operating expenses		6,475		7,098		21,276				22,242
Income from operations		1,133		1,098		4,993				2,261
Interest and other expense, net		94		153		433				500
Income before income taxes		1,039		945		4,560				1,761
Income tax expense:
Current		23		54		112				173
Net operating loss usage and other deferred		4		314		9				571
Total income tax expense		27		368		121				744
Net income	$	1,012	$	577	$	4,439		$		1,017
Basic net income per share	$	0.02	$	0.01	$	0.09		$		0.02
Diluted net income per share	$	0.02	$	0.01	$	0.08		$		0.02
Weighted average outstanding shares used to compute basic net income per share		51,269		51,797		51,008				51,625
Weighted average outstanding shares used to compute diluted net income per share		56,173		52,580		55,458				53,774

See accompanying notes to condensed consolidated financial statements.

3

HESKA CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

		Nine Months Ended September 30,
		2007						2008
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net income		$	4,439				$			1,017
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization			1,445							2,337
Deferred tax expense (benefit)			9							654
Stock-based compensation			171							302
(Gain) on disposition of assets			(47		)					—
Unrealized (gain) loss on foreign currency translation			(36		)					38
Changes in operating assets and liabilities:
Accounts receivable			452							(55		)
Inventories			(2,252		)					823
Other current assets			105							43
Accounts payable			(246		)					254
Accrued liabilities			(582		)					559
Deferred revenue and other liabilities			(1,417		)					(1,686		)
Income taxes payable			(40		)					—
Other			2							—
Net cash provided by (used in) operating activities			2,003							4,286
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of assets, net of related costs			47							—
Purchase of property and equipment			(1,638		)					(528		)
Net cash provided by (used in) investing activities			(1,591		)					(528		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock			697							332
	Proceeds from (repayments of) line of credit borrowings, net			(96		)					(3,594		)
Proceeds from (repayments of) debt and capital lease obligations, net			(1,081		)					(582		)
Net cash provided by (used in) financing activities			(480		)					(3,844		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH			101						(4			)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			33						(90			)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD			5,275						5,524
CASH AND CASH EQUIVALENTS, END OF PERIOD		$	5,308				$		5,434
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest		$	614				$		528
Non-cash transfer of inventory to property and equipment		$	2,328				$		539

See accompanying notes to condensed consolidated financial statements.

4

HESKA CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

September 30, 2008

(UNAUDITED)

1. ORGANIZATION AND BUSINESS

Heska Corporation ("Heska" or the "Company") develops, manufactures, markets, sells and supports veterinary products. Heska's core focus is on the canine and feline companion animal health markets.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements are the responsibility of the Company's management and have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and pursuant to the instructions to Form 10-Q and rules and regulations of the Securities and Exchange Commission (the "SEC"). The condensed consolidated balance sheet as of September 30, 2008, the condensed consolidated statements of operations for the three months and nine months ended September 30, 2007 and 2008 and the condensed consolidated statements of cash flows for the nine months ended September 30, 2007 and 2008 are unaudited, but include, in the opinion of management, all adjustments (consisting of normal recurring adjustments) which the Company considers necessary for a fair presentation of its financial position, operating results and cash flows for the periods presented. All material intercompany transactions and balances have been eliminated in consolidation. Although the Company believes that the disclosures in these financial statements are adequate to make the information presented not misleading, certain information and footnote disclosures normally included in complete financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations of the SEC.

Results for any interim period are not necessarily indicative of results for any future interim period or for the entire year. The accompanying financial statements and related disclosures have been prepared with the presumption that users of the interim financial information have read or have access to the audited financial statements for the preceding fiscal year. Accordingly, these financial statements should be read in conjunction with the audited financial statements and the related notes thereto for the year ended December 31, 2007, included in the Company's Annual Report on Form 10-K filed with the SEC on March 3, 2008.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenue and expense during the reported period. Actual results could differ from those estimates. Significant estimates are required when establishing the allowance for doubtful accounts and the provision for excess/obsolete inventory, in determining the period over which the Company's obligations are fulfilled under agreements to license product rights and/or technology rights, and in determining the need for, and the amount of, a valuation allowance on certain deferred tax assets.

5

Inventories

Inventories are stated at the lower of cost or market using the first-in, first-out method. Inventory manufactured by the Company includes the cost of material, labor and overhead. If the cost of inventories exceeds estimated fair value, provisions are made to reduce the carrying value to estimated fair value.

Inventories, net consist of the following (in thousands):

	December 31,			September 30,
	2007			2008
Raw materials	$	4,865			$	6,497
Work in process		3,138				2,674
Finished goods		8,969				6,537
Allowance for excess or obsolete inventory		(577	)			(675	)
	$	16,395			$	15,033

Basic and Diluted Net Income (Loss) Per Share

Basic net income (loss) per common share is computed using the weighted average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the sum of the weighted average number of shares of common stock outstanding, and, if not anti-dilutive, the effect of outstanding common stock equivalents (such as stock options and warrants) determined using the treasury stock method. For the three and nine months ended September 30, 2008 and 2007, the Company reported net income and therefore, dilutive common stock equivalent securities, as computed using the treasury stock method, were added to basic weighted average shares outstanding for the period to derive the weighted average shares for the diluted earnings per share calculation. Common stock equivalent securities that were anti-dilutive for the three months ended September 30, 2008 and 2007, and therefore excluded, were outstanding options to purchase 7,978,742 and 1,588,878 shares of common stock, respectively. Common stock equivalent securities that were anti-dilutive for the nine months ended September 30, 2008 and 2007, and therefore excluded, were outstanding options to purchase 4,547,890 and 1,619,478 shares of common stock, respectively. These securities are anti-dilutive primarily due to exercise prices greater than the average value of the Company's common stock during the three and nine months ended September 30, 2008 and 2007. Should the Company's stock price increase, the number of common stock equivalents considered to be dilutive will increase.

3. CAPITAL STOCK

The Company adopted Statement of Financial Accounting Standards No. 123 (revised 2004) "Share-Based Payment" ("SFAS No. 123R") under the modified prospective method of adoption, effective January 1, 2006. SFAS No. 123R requires companies to measure the cost of employee services received in exchange for an award of equity instruments (including stock options) based on the estimated grant-date fair value of the award. The resulting cost is recognized over the period during which an employee is required to provide service in exchange for the award, usually the vesting period.

The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model, with the following weighted average assumptions for options granted in the three and nine months ended September 30, 2007 and 2008.

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	Three Months Ended September 30,				Nine Months Ended September 30,
	2007		2008		2007	2008
Risk-free interest rate		4.95%		2.14%	4.66%		2.61%
Expected lives		4.0 years		3.0 years	2.9 years		2.9 years
Expected volatility		62%		50%	58%		51%
Expected dividend yield		0%		0%	0%		0%

A summary of the Company's stock option plans is as follows:

		Year Ended December 31, 2007					Nine Months Ended September 30, 2008
		Options		Weighted Average Exercise Price			Options	Weighted Average Exercise Price
Outstanding at beginning of period			11,818,823		$	1.3575	12,118,417		$	1.3979
	Granted at market		980,835		$	1.9305	475,268		$	1.5319
	Granted above market		—		$	—	—		$	—
	Cancelled		(122,746	)	$	2.9538	(508,316	)	$	2.5069
	Exercised		(558,495	)	$	1.1348	(281,918	)	$	0.8564
Outstanding at end of period			12,118,417		$	1.3979	11,803,451		$	1.3685
Exercisable at end of period			11,340,083		$	1.3675	11,063,659		$	1.3440

The estimated fair value of stock options granted during the nine months ended September 30, 2008 and 2007 was computed to be approximately $264 thousand and $219 thousand, respectively. The amount is amortized ratably over the vesting period of the options. The per share weighted average estimated fair value of options granted during the nine months ended September 30, 2008 and 2007 was computed to be approximately $0.56 and $0.95, respectively. The total intrinsic value of options exercised during the nine months ended September 30, 2008 and 2007 was $136 thousand and $525 thousand, respectively. The cash proceeds from options exercised during the nine months ended September 30, 2008 and 2007 were $241 thousand and $588 thousand, respectively. In the three and nine months ended September 30, 2008, the Company's domestic net operating loss carryforward ("NOL") was increased by $9 thousand and $71 thousand, respectively, due to option exercises. As the Company maintained an equal and offsetting valuation allowance for all deferred tax assets in the three and nine months ended September 30, 2007, no net tax benefit was realized on the Company's statements of operations due to option exercises during that period.

The following table summarizes information about stock options outstanding and exercisable at September 30, 2008:

	Options Outstanding						Options Exercisable
Exercise Prices	Number of Options Outstanding at September 30, 2008		Weighted Average Remaining Contractual Life in Years		Weighted Average Exercise Price		Number of Options Exercisable at September 30, 2008		Weighted Average Exercise Price
$0.34 - $0.87		1,789,053		4.29	$	0.6424		1,789,053		$	0.6424
$0.88 - $1.06		2,787,534		5.37	$	0.9395		2,767,534		$	0.9396
$1.07 - $1.25		2,446,073		5.59	$	1.2166		2,446,073		$	1.2166
$1.26 - $1.82		2,294,202		6.96	$	1.5879		2,140,660		$	1.5981
$1.83 - $13.75		2,486,589		5.74	$	2.3188		1,920,339		$	2.4594
$0.34 - $13.75		11,803,451		5.64	$	1.3685		11,063,659		$	1.3440

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As of September 30, 2008, there was approximately $641 thousand of total unrecognized compensation expense related to outstanding stock options. That expense is expected to be recognized over a weighted average period of 1.9 years, with approximately $80 thousand to be recognized in the three months ending December 31, 2008 and all cost to be recognized as of September 2012, assuming all options vest according to the vesting schedules in place at September 30, 2008. As of September 30, 2008, the aggregate intrinsic value of outstanding options was approximately $111 thousand and the aggregate intrinsic value of exercisable options was approximately $111 thousand.

4. SEGMENT REPORTING

The Company is comprised of two reportable segments, Core Companion Animal Health ("CCA") and Other Vaccines, Pharmaceuticals and Products ("OVP"). The Core Companion Animal Health segment includes diagnostic instruments and supplies, as well as single use diagnostic and other tests, pharmaceuticals and vaccines, primarily for canine and feline use. These products are sold directly by the Company as well as through independent third-party distributors and other distribution relationships. CCA segment products manufactured at the Des Moines, Iowa production facility included in our OVP segment's assets are transferred at cost and are not recorded as revenue for our OVP segment. The Other Vaccines, Pharmaceuticals and Products segment includes private label vaccine and pharmaceutical production, primarily for cattle, but also for other animals including small mammals and fish. All OVP products are sold by third parties under third party labels.

Additionally, the Company generates non-product revenue from research and development projects for third parties, licensing of technology and royalties. The Company performs these research and development projects for both companion animal and livestock purposes.

Summarized financial information concerning the Company's reportable segments is shown in the following table (in thousands):

	Core Companion Animal Health				Other Vaccines, Pharmaceuticals and Products				Total
Nine Months Ended September 30, 2007:
Total revenue	$	49,934		$		12,359		$		62,293
Operating income		1,512				3,481				4,993
Interest expense		303				237				540
Total assets		27,285				13,169				40,454
Capital expenditures		858				780				1,638
Depreciation and amortization		782				663				1,445
Nine Months Ended September 30, 2008:
Total revenue	$	54,473		$		11,746	$				66,219
Operating income (loss)		(12	)			2,273					2,261
Interest expense		381				127					508
Total assets		61,421				10,759					72,180
Capital expenditures		192				336					528
Depreciation and amortization		1,648				689					2,337

8

	Core Companion Animal Health			Other Vaccines, Pharmaceuticals and Products				Total
Three Months Ended September 30, 2007:
Total revenue	$	16,053	$		3,438		$		19,491
Operating income		783			350				1,133
Interest expense		67			70				137
Total assets		27,285			13,169				40,454
Capital expenditures		416			166				582
Depreciation and amortization		318			225				543
Three Months Ended September 30, 2008:
Total revenue	$	19,240	$		2,446	$				21,686
Operating income		1,082			16					1,098
Interest expense		93			33					126
Total assets		61,421			10,759					72,180
Capital expenditures		66			25					91
Depreciation and amortization		521			230					751

5. COMPREHENSIVE INCOME

Comprehensive income includes net income plus the results of certain stockholders' equity changes not reflected in the Condensed Consolidated Statements of Operations. Such changes primarily include foreign currency translation items. Total comprehensive income for the three months ended September 30, 2007 and 2008 was $1.1 million and $378 thousand, respectively. Total comprehensive income for the nine months ended September 30, 2007 and 2008 was $4.6 million and $1.1 million, respectively.

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Item 2.

MANAGEMENT'S DISCUSSION AND ANALYSIS

OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with "Selected Consolidated Financial Data" and the Unaudited Condensed Consolidated Financial Statements and related Notes included in Part I Item 1 of this Form 10-Q.

This discussion contains forward-looking statements intended to qualify for the safe harbor created by the SEC under the Private Securities Litigation Reform Act of 1995. Such statements, which include statements concerning future revenue sources and concentration, gross profit margins, selling and marketing expenses, general and administrative expenses, research and development expenses, capital resources, capital expenditures and additional financings or borrowings, are subject to risks and uncertainties, including, but not limited to, those discussed below and elsewhere in this Form 10-Q, particularly in Part II Item 1A. "Risk Factors," that could cause actual results to differ materially from those projected. The forward-looking statements set forth in this Form 10-Q are as of November 10, 2008, and we do not intend to update this forward-looking information.

Overview

We develop, manufacture, market, sell and support veterinary products. Our business is comprised of two reportable segments, Core Companion Animal Health, which represented 83% of our product revenue for the twelve months ended September 30, 2008 and Other Vaccines, Pharmaceuticals and Products, which represented 17% of our product revenue for the twelve months ended September 30, 2008.

The Core Companion Animal Health ("CCA") segment includes diagnostic instruments and supplies as well as single use diagnostic and other tests, pharmaceuticals and vaccines, primarily for canine and feline use.

Diagnostic instruments and supplies represented approximately 48% of our product revenue for the twelve months ended September 30, 2008. Many products in this area involve placing an instrument in the field and generating future revenue from consumables, including items such as supplies and service, as that instrument is used. Approximately 32% of our product revenue for the twelve months ended September 30, 2008 resulted from the sale of such consumables to an installed base of instruments and approximately 16% of our product revenue was from new hardware sales. A loss of or disruption in supply of consumables we are selling to an installed base of instruments could substantially harm our business. All products in this area are supplied by third parties, who typically own the product rights and supply the product to us under marketing and/or distribution agreements. In many cases, we have collaborated with a third party to adapt a human instrument for veterinary use. Major products in this area include our handheld blood analysis instruments, our chemistry instruments and our hematology instruments and their affiliated operating consumables. Revenue from products in these three areas, including revenues from consumables, represented approximately 44% of our product revenue for the twelve months ended September 30, 2008.

Single use diagnostic and other tests, pharmaceuticals and vaccines and other products represented approximately 35% of our product revenue for the twelve months ended September 30, 2008. Since items in this area are single use by their nature, our aim is to build customer satisfaction and loyalty for each product, generate repeat annual sales from existing customers and expand our customer base in the future. Products in this area are both supplied by third parties and provided by us. Major products in this area include our heartworm diagnostic tests, our heartworm preventive, our allergy test kits, our allergy immunotherapy and our allergy diagnostic tests. Combined revenue from heartworm-related products and allergy-related products represented approximately 32% of our product revenue for the twelve months ended September 30, 2008.

We consider the CCA segment to be our core business and devote most of our management time and other resources to improving the prospects for this segment. Maintaining a continuing, reliable and economic

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supply of products we currently obtain from third parties is critical to our success in this area. Virtually all of our sales and marketing expenses occur in the CCA segment. The majority of our research and development spending is dedicated to this segment, as well. We strive to provide high value products and advance the state of veterinary medicine.

All our CCA products are ultimately sold to or through veterinarians. In many cases, veterinarians will mark up their costs to the end user. The acceptance of our products by veterinarians is critical to our success. CCA products are sold directly by us as well as through independent third party distributors and other distribution relationships, such as corporate agreements. Revenue from direct sales, independent third-party distributors and other distribution relationships represented approximately 49%, 29% and 22%, respectively, of CCA product revenue for the twelve months ended September 30, 2008.

Independent third-party distributors may be effective in increasing sales of our products to veterinarians, although we would expect a corresponding lower gross margin as such distributors typically buy products from us at a discount to end user prices. For us to be effective when working with an independent third-party distributor, the distributor must agree to market and/or sell our products and we must provide proper economic incentives to the distributor as well as contend effectively for the distributor's time and focus given other products the distributor may be carrying, potentially including those of our competitors. We believe that one of our largest competitors, IDEXX Laboratories, Inc. ("IDEXX"), in effect prohibits its distributors from selling competitive products, including our diagnostic instruments and heartworm diagnostic tests. We believe the IDEXX restrictions limit our ability to engage national distributors to sell our full distribution line of products.

We intend to sustain profitability through a combination of revenue growth, gross margin improvement and expense control. Accordingly, we closely monitor product revenue growth trends in our CCA segment. Product revenue in this segment grew 10% for the twelve months ended September 30, 2008 as compared to the twelve months ended September 30, 2007 and has grown at a compounded annual growth rate of 17% since 1998, our first full year as a public company.

The Other Vaccines, Pharmaceuticals and Products segment ("OVP") includes our 168,000 square foot USDA- and FDA-licensed production facility in Des Moines, Iowa. We view this facility as a strategic asset which will allow us to control our cost of goods on any vaccines and pharmaceuticals that we may commercialize in the future. We are increasingly integrating this facility with our operations elsewhere. For example, virtually all our U.S. inventory is now stored at this facility and fulfillment logistics are managed there. CCA segment products manufactured at this facility are transferred at cost and are not recorded as revenue for our OVP segment. We view OVP reported revenue as revenue primarily to cover the overhead costs of the facility and to generate incremental cash flow to fund our CCA segment.

Our OVP segment includes private label vaccine and pharmaceutical production, primarily for cattle but also for other animals including small mammals and fish. All OVP products are sold by third parties under third party labels.

We have developed our own line of bovine vaccines that are licensed by the USDA. We have a long-term agreement with a distributor, Agri Laboratories, Ltd., ("AgriLabs"), for the marketing and sale of certain of these vaccines which are sold primarily under the Titanium® and MasterGuard® brands which are registered trademarks of AgriLabs. This agreement generates a significant portion of our OVP segment's revenue. Subject to certain purchase minimums, under our long-term agreement AgriLabs has the exclusive right to sell the aforementioned bovine vaccines in the United States, Africa and Mexico until December 2009. Our OVP segment also produces vaccines and pharmaceuticals for other third parties.

Additionally, we generate non-product revenues from licensing of technology, royalties and sponsored research and development projects for third parties. We perform these sponsored research and development projects for both companion animal and livestock product purposes.

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Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations is based upon the consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP"). The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenue and expense during the periods. These estimates are based on historical experience and various other assumptions that we believe to be reasonable under the circumstances. We have identified those critical accounting policies used in reporting our financial position and results of operations based upon a consideration of those accounting policies that involve the most complex or subjective decisions or assessment. We consider the following to be our critical policies.

Revenue Recognition

We generate our revenue through the sale of products, licensing of technology product rights, royalties and sponsored research and development. Our policy is to recognize revenue when the applicable revenue recognition criteria have been met, which generally include the following:

• Persuasive evidence of an arrangement exists;

• Delivery has occurred or services rendered;

• Price is fixed or determinable; and

• Collectibility is reasonably assured.

Revenue from the sale of products is recognized after both the goods are shipped to the customer and acceptance has been received, if required, with an appropriate provision for estimated returns and allowances. We do not permit general returns of products sold. Certain of our products have expiration dates. Our policy is to exchange certain outdated, expired product with the same product. We record an accrual for the estimated cost of replacing the expired product expected to be returned in the future, based on our historical experience, adjusted for any known factors that reasonably could be expected to change historical patterns, such as regulatory actions which allow us to extend the shelf lives of our products. Revenue from both direct sales to veterinarians and sales to independent third-party distributors are generally recognized when goods are shipped. Our products are shipped complete and ready to use by the customer. The terms of the customer arrangements generally pass title and risk of ownership to the customer at the time of shipment. Certain customer arrangements provide for acceptance provisions. Revenue for these arrangements is not recognized until the acceptance has been received or the acceptance period has lapsed. We reduce our product revenue by the estimated cost of any rebates, allowances or similar programs, which are used as promotional programs.

Recording revenue from the sale of products involves the use of estimates and management judgment. We must make a determination at the time of sale whether the customer has the ability to make payments in accordance with arrangements. While we do utilize past payment history, and, to the extent available for new customers, public credit information in making our assessment, the determination of whether collectibility is reasonably assured is ultimately a judgment decision that must be made by management. We must also make estimates regarding our future obligation relating to returns, rebates, allowances and similar other programs.

License revenue under arrangements to sell or license product rights or technology rights is recognized as obligations under the agreement are satisfied, which generally occurs over a period of time. Generally, licensing revenue is deferred and recognized over the estimated life of the related agreements, products, patents or technology. Nonrefundable licensing fees, marketing rights and milestone payments received under contractual arrangements are deferred and recognized over the

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remaining contractual term using the straight-line method. Revenue from licensing technology and product rights is included in our research, development and other revenue line item. An example of the former, i.e., licensing technology, is a patent we own under which we have granted a third party exclusive rights to the human healthcare market for the life of the patent in exchange for an upfront payment and royalty payments on sales of any product based on the patent. The upfront payment will be amortized over the life of the patent and reported along with any affiliated royalty payments in our research, development and other revenue line item. An example of the latter, i.e., product rights, is our July 2002 agreement to license Intervet Inc. certain rights to patents, trademarks and know-how for our Flu AVERT I.N. equine influenza vaccine, the world's first intranasal influenza vaccine for horses. As we have no further rights to manufacture, market or sell this vaccine without Intervet Inc.'s permission, we are reporting the amortization of the upfront payment we received in this agreement along with any affiliated royalty payments in our research, development and other revenue line item. The upfront payment is being amortized over the estimated life of the product.

Recording revenue from license arrangements involves the use of estimates. The primary estimate made by management is determining the useful life of the related agreement, product, patent or technology. We evaluate all of our licensing arrangements by estimating the useful life of either the product or the technology, the length of the agreement or the legal patent life and defer the revenue for recognition over the appropriate period.

Occasionally we enter into arrangements that include multiple elements. Such arrangements may include the licensing of technology and manufacturing of product. In these situations we must determine whether the various elements meet the criteria to be accounted for as separate elements. If the elements cannot be separated, revenue is recognized once revenue recognition criteria for the entire arrangement have been met or over the period that the Company's obligations to the customer are fulfilled, as appropriate. If the elements are determined to be separable, the revenue is allocated to the separate elements based on relative fair value and recognized separately for each element when the applicable revenue recognition criteria have been met. In accounting for these multiple element arrangements, we must make determinations about whether elements can be accounted for separately and make estimates regarding their relative fair values.

Allowance for Doubtful Accounts

We maintain an allowance for doubtful accounts receivable based on client-specific allowances, as well as a general allowance. Specific allowances are maintained for clients which are determined to have a high degree of collectibility risk based on such factors, among others, as: (i) the aging of the accounts receivable balance; (ii) the client's past payment experience; (iii) a deterioration in the client's financial condition, evidenced by weak financial condition and/or continued poor operating results, reduced credit ratings, and/or a bankruptcy filing. In addition to the specific allowance, the Company maintains a general allowance for credit risk in its accounts receivable which is not covered by a specific allowance. The general allowance is established based on such factors, among others, as: (i) the total balance of the outstanding accounts receivable, including considerations of the aging categories of those accounts receivable; (ii) past history of uncollectible accounts receivable write-offs; and (iii) the overall creditworthiness of the client base. A considerable amount of judgment is required in assessing the realizability of accounts receivable. Should any of the factors considered in determining the adequacy of the overall allowance change, an adjustment to the provision for doubtful accounts receivable may be necessary.

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Inventories

Inventories are stated at the lower of cost or market, cost being determined on the first-in, first-out method. Inventories are written down if the estimated net realizable value of an inventory item is less than its recorded value. We review the carrying cost of our inventories by product each quarter to determine the adequacy of our reserves for obsolescence. In accounting for inventories we must make estimates regarding the estimated net realizable value of our inventory. This estimate is based, in part, on our forecasts of future sales and shelf life of product.

Deferred Tax Assets – Valuation Allowance

Our deferred tax assets, such as an NOL, are reduced by an offsetting valuation allowance based on judgmental assessment of available evidence if we are unable to conclude that it is more likely than not that some or all of the related deferred tax assets will be realized. If we are able to conclude it is more likely than not that we will realize a future benefit from a deferred tax asset, we will reduce the related valuation allowance by an amount equal to the estimated quantity of income taxes we would pay in cash if we were not to utilize the deferred tax asset in the future. The first time this occurs in a given jurisdiction, it will result in a net deferred tax asset on our balance sheet and an income tax benefit of equal magnitude in our statement of operations in the period we make the determination. In future periods, we will then recognize as income tax expense the estimated quantity of income taxes we would have paid in cash had we not utilized the related deferred tax asset. The corresponding journal entry will be a reduction of our deferred tax asset. If there is a change regarding our tax position in the future, we will make a corresponding adjustment to the related valuation allowance.

Results of Operations

Revenue

Total revenue consists of two components: 1) product revenue and 2) research, development and other revenue. Total revenue increased 6% to $66.2 million for the nine months ended September 30, 2008 as compared to $62.3 million for the corresponding period in 2007. Product revenue increased 7% to $65.2 million for the nine months ended September 30, 2008 as compared to $61.1 million for the corresponding period in 2007. Total revenue increased 11% to $21.7 million for the three months ended September 30, 2008 as compared to $19.5 million for the corresponding period in 2007. Product revenue increased 12% to $21.4 million for the three months ended September 30, 2008 as compared to $19.0 million for the corresponding period in 2007.

Product revenue from our CCA segment was $53.6 million for the nine months ended September 30, 2008, an increase of 10% as compared to $48.8 million for the corresponding period in 2007. Key factors in the increase were higher sales of our chemistry instruments, our heartworm diagnostic tests, both internationally and domestically, our instrument consumables, our hematology instruments and our heartworm preventive domestically, somewhat offset by decreased sales of our handheld diagnostic instruments and our heartworm preventive internationally. Product revenue from our CCA segment was $18.9 million for the three months ended September 30, 2008, an increase of 21% as compared to $15.6 million for the corresponding period in 2007. Key factors in the increase were higher sales of our chemistry instruments, our instrument consumables, our heartworm preventive domestically, our heartworm diagnostic tests domestically and our hematology instruments.

Product revenue from our Other Vaccines, Pharmaceuticals and Products segment ("OVP") decreased by $681 thousand to $11.6 million for the nine months ended September 30, 2008 as compared to $12.3 million in the corresponding period in 2007. The largest factor in the decrease was approximately $1.6 million in revenue recognized (the "United Revenue") in the first quarter of 2007, upon receipt of a payment for product previously shipped and "take or pay" minimums for 2005 and 2006 which previously had not been paid as part of a now

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settled dispute with United Vaccines, Inc. ("UV"), a former customer. This was somewhat offset by increased sales of bovine vaccines under our agreement with AgriLabs and greater sales of our fish vaccines. Product revenue from our Other Vaccines, Pharmaceuticals and Products segment ("OVP") decreased by $1.0 million to $2.4 million for the three months ended September 30, 2008 as compared to $3.4 million in the corresponding period in 2007. Lower sales of our fish vaccines was the primary reason for the decline. This was somewhat offset by an increase in sales of bovine vaccines under our agreement with AgriLabs.

Research, development and other revenue was $1.0 million in the nine months ended September 30, 2008, down slightly from $1.2 million in the corresponding period in 2007. The primary factor in the decrease was $250 thousand in revenue recognized from a service contract in the nine months ended September 30, 2007 which did not occur in the corresponding 2008 period. The service contract completed in 2007 was related to a worldwide patent portfolio covering a number of major allergens and the genes that encode them (the "Allergopharma Portfolio") and was with the buyer of the Allergopharma Portfolio, which we sold in December 2006. The decline in revenue from this service contract was somewhat offset by an increase in royalty revenue. Research, development and other revenue was $316 thousand in the three months ended September 30, 2008, a decline of approximately $175 thousand from $491 thousand in the corresponding period in 2007. A key factor in the decrease was revenue from a now completed service contract we had with the buyer of the Allergopharma Portfolio under which we received our final payment in the three months ended September 30, 2007.

In 2008, we expect growth in our Core Companion Animal Health segment product revenue as compared to 2007, although we anticipate a decline in product revenue in this area in the fourth quarter of 2008 as compared to the fourth quarter of 2007. We anticipate 2008 OVP product revenue to be approximately $13.25 million, a decrease as compared to 2007. We expect research, development and other revenue to be approximately $1.3 million in 2008, a decrease when compared to 2007.

Cost of Revenue

Cost of revenue consists of two components: 1) cost of products sold and 2) cost of research, development and other revenue, both of which correspond to their respective revenue categories. Cost of revenue totaled $41.7 million for the first nine months of 2008, a 16% increase as compared to $36.0 million for the corresponding period in 2007. Gross profit decreased by $1.8 million to $24.5 million for the nine months ended September 30, 2008 as compared to $26.3 million in the prior year corresponding period. Gross Margin, i.e. gross profit divided by total revenue, decreased to 37.0% for the nine months ended September 30, 2008 as compared to 42.2% in the corresponding period in 2007. Cost of revenue totaled $13.5 million for the three months ended September 30, 2008, a 14% increase as compared to $11.9 million for the corresponding period in 2007. Gross profit increased by $588 thousand to $8.2 million for the three months ended September 30, 2008 as compared to $7.6 million in the prior year corresponding period. Gross Margin decreased to 37.8% for the three months ended September 30, 2008 as compared to 39.0% in the corresponding period in 2007.

Cost of products sold increased by $5.6 million to $41.4 million in the nine months ended September 30, 2008 from $35.8 million in the prior year period. Gross profit on product revenue decreased by $1.5 million to $23.8 million for the nine months ended September 30, 2008 as compared to $25.3 million in the prior year period. Product Gross Margin, i.e. gross profit on product revenue divided by product revenue, was 36.5% for the nine months ended September 30, 2008, a decrease from 41.4% in the corresponding period in 2007. The largest factor in the decrease was recognition of the United Revenue in the three months ended March 31, 2007, for which the affiliated Cost of products sold had been recognized in prior periods and for which no corresponding revenue or gross profit was recognized in the 2008 comparable period. In addition, product mix and increased reserves taken against inventory we expect to expire prior to sale, primarily related to consumables for our handheld diagnostic instruments, were factors in the decrease. Cost of products sold increased by $1.6 million to $13.4 million in the three months ended September 30, 2008 from $11.8 million in the prior year period. Gross profit on product revenue increased by $793 thousand to $8.0 million for the three months ended September 30, 2008 as compared to $7.2 million in the prior year period. Product Gross Margin, i.e. gross profit on product revenue divided by product revenue, was 37.3% for the three months ended September 30, 2008, a decrease from 37.8% in the corresponding period in 2007. A key factor in the decline was product mix.

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Cost of research, development and other revenue was $321 thousand in the nine months ended September 30, 2008, an increase of $87 thousand as compared to $234 thousand in the prior year period. Gross profit on research, development and other revenue was $694 thousand for the nine months ended September 30, 2008, a $275 thousand decrease as compared to $969 thousand in the prior year period. Other Gross Margin, i.e. gross profit on research, development and other revenue divided by research, development and other revenue, was 68.4% for the nine months ended September 30, 2008, down from 80.5% in the prior year period. A key factor in the decrease was a higher percentage of revenue in this area was generated from sponsored research and development, an activity which tends to yield below average margins, in 2008 as compared to 2007. Cost of research, development and other revenue was $88 thousand in the three months ended September 30, 2008, an increase of $30 thousand as compared to $58 thousand in the prior year period. Gross profit on research, development and other revenue was $228 thousand for the three months ended September 30, 2008, a $205 thousand decrease as compared to $433 thousand in the prior year period. Other Gross Margin, i.e. gross profit on research, development and other revenue divided by research, development and other revenue, was 72.2% for the three months ended September 30, 2008, down from 88.2% in the prior year period. A key factor in the decrease was a higher percentage of revenue in this area was generated sponsored research and development, an activity which tends to yield below average margins.

We expect Gross Margin to decline for 2008 as a whole compared to 2007.

Operating Expenses

Total operating expenses increased 5% to $22.2 million in the nine months ended September 30, 2008 as compared to $21.3 million in the prior year period. Total operating expenses increased 10% to $7.1 million in the three months ended September 30, 2008 as compared to $6.5 million in the prior year period.

Selling and marketing expenses increased 15% to $14.0 million in the nine months ended September 30, 2008 as compared to $12.2 million in the corresponding period in 2007. Key factors in the change were an increase in personnel, greater advertising expenses and increased expenditures on market research. Selling and marketing expenses increased 17% to $4.5 million in the three months ended September 30, 2008 as compared to $3.8 million in the corresponding period in 2007. Key factors in the change were increased expenditures on market research and an increase in personnel.

Research and development expenses were $1.5 million for the nine months ended September 30, 2008, a decline of approximately $647 thousand as compared to $2.1 million in the corresponding period in 2007. Research and development expenses were $506 thousand for the three months ended September 30, 2008, a decline of approximately $157 thousand compared to $663 thousand in the corresponding period in 2007. In both cases, a key factor in the change was less space at our corporate headquarters being used for research and development activities. In late 2007, we implemented a plan to move and expand space for certain activities within our corporate headquarters, which reduced the space dedicated to research and development activities.

General and administrative expenses were $6.8 million in the nine months ended September 30, 2008, down 4% from $7.0 million in the prior year period. A key factor in the change was a lower expense accrual related to our Management Incentive Program ("MIP") in 2008 as compared to 2007. General and administrative expenses were $2.1 million in the three months ended September 30, 2008, up 6% from $2.0 million in the prior year period. Year-over-year differences in sales and property tax were factors in the increase.

In the nine months ended September 30, 2007, we recognized a gain of approximately $47 thousand on the sale of certain patents we held, net of costs.  We had no corresponding gain on asset sale in the 2008 period.

In 2008, we expect total operating expenses to increase as compared to 2007. We expect operating expenses generally will increase more slowly than increases in revenue.

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Interest and Other Expense, Net

Interest and other expense, net was $500 thousand in the nine months ended September 30, 2008, an increase of $67 thousand as compared to $433 thousand in the prior year period, and was $153 thousand in the three months ended September 30, 2008, an increase of $59 thousand as compared to $94 thousand in the prior year period. Interest and other expense, net can be broken into two components: net interest expense and net foreign currency gain (or loss). Net interest expense was $456 thousand in the nine months ended September 30, 2008, a decrease of $19 thousand from $475 thousand in the prior year period. Lower interest rates due to decreases in the Prime rate and lower interest rate spreads based on our achievement of negotiated milestones under our credit and security agreement with Wells Fargo Bank, National Association ("Wells Fargo"), largely offset by increased borrowings, were responsible for the decline. Net interest expense was $111 thousand in the three months ended September 30, 2008, a decrease of $3 thousand from $114 thousand in the prior year period. Decreases in the Prime rate largely offset by greater borrowings were responsible for the decline. In the nine months ended September 30, 2008, net foreign currency loss was $44 thousand, a change of $86 thousand from a net foreign currency gain of $42 thousand in the prior year period. In the three months ended September 30, 2008, net foreign currency loss was $42 thousand, a change of $62 thousand from a net foreign currency gain of $20 thousand in the prior year period.

We expect interest and other expense, net to increase in 2008 as compared to 2007 due to greater borrowings.

Income Tax Expense

Income tax expense was $744 thousand in the nine months ended September 30, 2008, a $623 thousand increase as compared to $121 thousand in the prior year period. Income tax expense was $368 thousand in the three months ended September 30, 2008, a $341 thousand increase as compared to $27 thousand in the prior year period.

Current income tax expense was $173 thousand in the nine months ended September 30, 2008, an increase of $61 thousand from $112 thousand as compared to the prior year period. The change was due to the recognition of certain state income taxes in the 2008 period, somewhat offset by a lower accrual of domestic Federal alternative minimum tax. Current income tax expense was $54 thousand in the three months ended September 30, 2008, an increase of $31 thousand as compared to $23 thousand in the prior year period. The primary reason for the change was the recognition of certain state income taxes in the 2008 period.

Net operating loss usage and other deferred income tax expense was $571 thousand in the nine months ended September 30, 2008, an increase of $562 thousand from $9 thousand in the prior year period. Net operating loss usage and other deferred tax expense was $314 thousand in the three months ended September 30, 2008, an increase of $310 thousand from $4 thousand in the prior year period. In both cases, the change was due to the recognition of domestic net operating loss usage and other deferred income tax expense in the 2008 period, but not in the 2007 period, for the reasons outlined in the next paragraph.

In the fourth quarter of 2007, based on our profitable domestic operating performance, we concluded that a portion of our domestic deferred tax assets, which primarily consist of our domestic NOL, was realizable on a more-likely-than-not basis and the related valuation allowance was reduced, resulting in an income tax benefit of $30 million, reported as a valuation allowance adjustment income tax benefit. This resulted in a net deferred tax asset of $30 million for our domestic deferred tax assets. We do not expect to have any valuation allowance adjustment income tax expense or benefit in 2008 and expect to record valuation allowance adjustment income tax expense or benefit infrequently, if at all, in future years.

We expect to report a higher percentage of our pre-tax income as income tax expense for 2008 as compared to 2007 due to the recognition of domestic net operating loss usage and other deferred income tax

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expense related to domestic taxable income. We did not recognize domestic net operating loss usage and other deferred income tax expense in 2007 as we did not reduce the related valuation allowance until year end.

Net Income

Net income was $1.0 million in the nine months ended September 30, 2008, a decrease of approximately $3.4 million compared to net income of $4.4 million in the prior year period. As discussed above, the decrease was primarily due to lower Gross Margin, higher operating expenses and increased income tax expense. Net income was $577 thousand in the three months ended September 30, 2008, a decrease of approximately $435 thousand compared to net income of $1.0 million in the prior year period. As discussed above, the decrease was primarily due to increased operating expenses and income tax expense.

We expect to generate net income of approximately $150 thousand in 2008 for the reasons outlined above, which implies a significant net loss in the fourth quarter of 2008.

Liquidity and Capital Resources

We have incurred net cumulative negative cash flow from operations since our inception in 1988. For the nine months ended September 30, 2008, we had a net income of $1.0 million. During the nine months ended September 30, 2008, our operations provided cash of approximately $4.3 million. At September 30, 2008, we had $5.4 million of cash and cash equivalents, $10.4 million of working capital, $9.0 million of outstanding borrowings under our revolving line of credit, discussed below, and $1.3 million of other debt and capital leases.

Net cash provided by operating activities was approximately $4.3 million for the nine months ended September 30, 2008 as compared to $2.0 million provided by operating activities in the prior year period. Major factors in the increase in cash provided by operating activities for the nine months ended September 30, 2008 as compared to the same period in 2007 were a $3.1 million increase in cash provided by inventory, a $1.1 million increase in cash provided from accrued liabilities, an increase of $892 thousand in depreciation, amortization, an increase of $645 thousand in deferred tax expense and an increase of $500 thousand in cash provided by accounts payable. A key factor in the increase in depreciation and amortization was increased rental units. The increase in deferred tax expense was related primarily to our recognition of domestic net operating loss usage upon releasing the related valuation allowance based on our conclusion in the fourth quarter of 2007 that a portion of our domestic deferred tax assets was realizable on a more-likely-than-not basis. These factors were somewhat offset by a $3.4 million decline in net income and a $507 thousand increase in cash used for accounts receivable.

Net cash flows from investing activities used cash of $528 thousand in the nine months ended September 30, 2008, compared to $1.6 million during the corresponding period in 2007. The reduced usage of cash was primarily due to a decrease in capital expenditures of $1.1 million in 2008.

Net cash flows used in financing activities was $3.8 million during the nine months ended September 30, 2008 as compared to $480 thousand during the corresponding period in 2007. We repaid approximately $500 thousand less in term debt in the 2008 period as a $500 thousand term loan from a customer matured and was repaid in the 2007 period. Proceeds from the issuance of common stock decreased by approximately $365 thousand, primarily due to lower proceeds from option exercises. Our revolving line of credit with Wells Fargo used an additional $3.5 million of cash, as we repaid over $3.6 million in the nine months ended September 30, 2008 as compared to $96 thousand in the nine months ended September 30, 2007.

At September 30, 2008, we had a $15.0 million asset-based revolving line of credit with Wells Fargo which has a maturity date of June 30, 2009 as part of our credit and security agreement with Wells Fargo. In October 2008, we amended this agreement to, among other things, extend the maturity date of the agreement from June 30, 2009 to June 30, 2011 and extend the maturity date of two of the three term loans outstanding under the agreement to June 30, 2011. At September 30, 2008, $9.0 million was outstanding under this line of credit. Our ability to borrow under this facility varies based upon available cash, eligible accounts receivable and eligible inventory. On September 30, 2008, interest was charged at a stated rate of Prime plus 0% and was payable monthly. We are required to comply with various financial and non-financial covenants, and we have made various representations and

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warranties. Among the financial covenants is a requirement to maintain a minimum liquidity (cash plus excess borrowing base) of $1.5 million. Additional requirements include covenants for minimum capital monthly and minimum net income quarterly. Failure to comply with any of the covenants, representations or warranties could result in our being in default on the loan and could cause all outstanding amounts payable to Wells Fargo to become immediately due and payable or impact our ability to borrow under the agreement. Any default under the Wells Fargo agreement could also accelerate the repayment of our other borrowings. We were in compliance with all financial covenants as of September 30, 2008, although we do not expect we will be able to comply with all financial covenants through the end of 2008. At September 30, 2008, we had $4.2 million borrowing capacity based upon eligible accounts receivable and eligible inventory under our revolving line of credit.

At September 30, 2008, we also had outstanding obligations for long-term debt and capital leases totaling approximately $1.3 million primarily related to three term loans with Wells Fargo. One term loan is secured by real estate in Iowa and had an outstanding balance of approximately $322 thousand with a stated interest rate of Prime plus 0% on September 30, 2008. This loan is due in monthly installments of $17,658 plus interest, with a balloon payment of approximately $163 thousand due on June 30, 2009. Under our credit and security agreement with Wells Fargo, the maturity on this loan may be extended to May 2010 if Wells Fargo receives an updated valuation on the underlying assets. The other two term loans are secured by machinery and equipment at our Des Moines, Iowa and Loveland, Colorado locations, respectively (the "Equipment Notes"). The Equipment Notes had an outstanding balance of approximately $1.0 million with a stated interest rate of Prime plus 0% on September 30, 2008. Principal payments on the Equipment Notes of $46,296 plus interest are due in monthly installments. Our capital lease obligations totaled approximately $4 thousand at September 30, 2008.

At September 30, 2008, we had deferred revenue and other long-term liabilities, net of current portion, of approximately $5.3 million. Included in this total is approximately $4.2 million of deferred revenue related to up-front fees that have been received for certain product rights and technology rights out-licensed. These deferred amounts are being recognized on a straight-line basis over the remaining lives of the agreements, products, patents or technology.

Our primary short-term need for capital, which is subject to change, is to fund our operations, which consist of continued sales and marketing, general and administrative and research and development efforts, working capital associated with increased product sales and capital expenditures relating to maintaining and developing our manufacturing operations. Our future liquidity and capital requirements will depend on numerous factors, including the extent to which our marketing and selling efforts, as well as those of third parties who market and sell our products, are successful in increasing revenue, the extent to which currently planned products and/or technologies are successfully developed, launched and sold, changes required by regulatory bodies to maintain our operations and other factors.

We do not expect we will be able to comply with all financial covenants through the end of 2008 under our credit and security agreement with Wells Fargo. Although we have been able to negotiate waivers and new covenants when we have violated covenants with Wells Fargo in the past and expect to be able to do so in 2008 if necessary, we may not be able to do so if we fail to comply with any 2008 covenants. We anticipate a significant net loss in the fourth quarter of 2008 and our current expectation is for a net loss in the first half of 2009 followed by net income in the second half of 2009. If our current expectations are accurate and we are able to negotiate a waiver of any 2008 financial covenant violation with Wells Fargo or enter into a new credit and security agreement with a new financial institution on terms similar to our current agreement with Wells Fargo, we do not anticipate the need for additional capital. However, our actual results may differ from these expectations, and we may be required to consider alternative strategies. We may be required to raise additional capital in the future. If necessary, we expect to raise these additional funds through the sale of equity or refinancing part or all of our loans currently outstanding under our credit and security agreement with Wells Fargo, which we believe includes loans against assets with historical appraised values significantly in excess of related debt. There is no guarantee that additional capital will be available from these sources on acceptable terms, if at all, and certain of these sources may require approval by existing lenders. If we cannot raise the additional funds through these options on acceptable terms or with the necessary timing, management could also reduce discretionary spending to decrease our cash burn rate through actions such as delaying or canceling budgeted research activities or marketing plans. These actions would likely extend the then available cash and cash equivalents, and then available borrowings to some degree.

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Net Operating Loss Carryforwards

As of December 31, 2007, we had a net domestic operating loss carryforward, or NOL, of approximately $165.2 million, a domestic alternative minimum tax credit of approximately $129 thousand and a domestic research and development tax credit carryforward of approximately $312 thousand. Our NOL is scheduled to expire in various years beginning in 2010 and ending in 2025, with the majority scheduled to expire in 2018 or later. The NOL and tax credit carryforwards are subject to alternative minimum tax limitations and to examination by the tax authorities. In addition, we had a "change of ownership" as defined under the provisions of Section 382 of the Internal Revenue Code of 1986, as amended (an "Ownership Change"). We believe the latest Ownership Change occurred at the time of our initial public offering in July 1997. We do not believe this Ownership Change will place a significant restriction on our ability to utilize our NOLs in the future. We also had net operating loss carryforwards in Switzerland of approximately $920 thousand as of December 31, 2007 related to losses previously recorded by Heska AG which are scheduled to expire at the end of 2008.

Recent Accounting Pronouncements

None.

Item 3.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk represents the risk of loss that may impact the financial position, results of operations or cash flows due to adverse changes in financial and commodity market prices and rates. We are exposed to market risk in the areas of changes in United States and foreign interest rates and changes in foreign currency exchange rates as measured against the United States dollar and against other foreign currency exchange rates. These exposures are directly related to our normal operating and funding activities.

Interest Rate Risk

The interest payable on certain of our lines of credit and other borrowings is variable based on the United States prime rate and, therefore, is affected by changes in market interest rates. At September 30, 2008, approximately $10.4 million was outstanding on these lines of credit and other borrowings with a weighted average interest rate of 5%. We also had approximately $5.4 million of cash and cash equivalents at September 30, 2008, the majority of which was invested in liquid interest bearing accounts. We had no interest rate hedge transactions in place on September 30, 2008. We completed an interest rate risk sensitivity analysis based on the above and an assumed one-percentage point increase/decrease in interest rates. If market rates increase/decrease by one percentage point, we would experience an increase/decrease in annual net interest expense of approximately $49 thousand based on our outstanding balances as of September 30, 2008.

Foreign Currency Risk

Our investment in foreign assets consists primarily of our investment in our European subsidiary. Foreign currency risk may impact our results of operations. In cases where we purchase inventory in one currency and sell corresponding products in another, our gross margin percentage is typically at risk based on foreign currency exchange rates. In addition, in cases where we may be generating operating income in foreign currencies, the magnitude of such operating income when translated into U.S. dollars will be at risk based on foreign currency exchange rates. Our agreements with suppliers and customers vary significantly in regard to the existence and extent of currency adjustment and other currency risk sharing provisions. We had no foreign currency hedge transactions in place on September 30, 2008.

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We have a wholly-owned subsidiary in Switzerland which uses the Swiss Franc as its functional currency. We purchase inventory in foreign currencies, primarily Japanese Yen and Euros, and sell corresponding products in U.S. dollars. We also sell products in foreign currencies, primarily Japanese Yen and Euros, where our inventory costs are in U.S. dollars. Based on our results of operations for the most recent 12 months, if foreign currency exchange rates were to strengthen/weaken by 25% against the dollar, we would expect a resulting pre-tax loss/gain of approximately $1.3 million.

Item 4.

CONTROLS AND PROCEDURES

(a) Evaluation of Disclosure Controls and Procedures. Our management, with the participation of our chief executive officer and our chief financial officer, evaluated the effectiveness of our disclosure controls and procedures, as defined by Rule 13a-15 of the Exchange Act, as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, our chief executive officer and our chief financial officer have concluded that our disclosure controls and procedures are adequate to provide reasonable assurance that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms and that such information is accumulated and communicated to our management, including our chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure.

(b) Changes in Internal Control over Financial Reporting. There was no change in our internal control over financial reporting that occurred during our last fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

From time to time, we may be involved in litigation relating to claims arising out of our operations. As of September 30, 2008, we were not a party to any legal proceedings that are expected, individually or in the aggregate, to have a material effect on our business, financial condition or operating results.

Item 1A. Risk Factors

Our future operating results may vary substantially from period to period due to a number of factors, many of which are beyond our control. The following discussion highlights these factors and the possible impact of these factors on future results of operations. If any of the following factors actually occur, our business, financial condition or results of operations could be harmed. In that case, the price of our common stock could decline and you could experience losses on your investment.

We do not believe we will be able to comply with all 2008 financial covenants required under our credit agreement with Wells Fargo. If we are unable to negotiate a waiver of any covenant violation under our credit agreement and maintain various financial and other covenants under this or similar agreements in the future, we will be unable to borrow any funds under the agreement and fund our operations.

We have informed Wells Fargo we do not expect we will be able to comply with all financial covenants through the end of 2008. Under our credit and security agreement with Wells Fargo, we are required to comply with various financial and non-financial covenants in order to borrow under the agreement. The availability of borrowings under this agreement is essential to continue to fund our operations. Key financial covenants of concern are minimum capital, a monthly covenant, and minimum net income, a quarterly covenant. Additional financial covenants include a requirement to maintain minimum liquidity (cash plus excess borrowing base) of $1.5 million. We have not always been able to maintain compliance with all covenants under our credit and security agreement in the past. Although Wells Fargo granted us a waiver of non-compliance in each case, there can be no assurance we will be able to obtain similar waivers or other modifications on economic terms, if at all, if we fail to comply with 2008 financial covenants or other covenants in the future.

Failure to comply with any of the covenants, representations or warranties, or failure to modify them to allow future compliance, could result in our being in default and could cause all outstanding borrowings under our credit and security agreement to become immediately due and payable, or impact our ability to borrow under the agreement. We intend to rely on available borrowings under the credit and security agreement to fund our operations in the future. If we are unable to borrow funds under this agreement, we will need to raise additional capital from other sources to continue our operations, which capital may not be available on acceptable terms, or at all.

Our common stock is listed on the Nasdaq Capital Market and we may not be able to maintain that listing, which may make it more difficult for you to sell your shares.

Our common stock is listed on the Nasdaq Capital Market. The Nasdaq has several quantitative and qualitative requirements companies must comply with to maintain this listing, including a $1.00 minimum bid price. We are currently not in compliance with the $1.00 minimum bid price. We have received a communication from Nasdaq advising us that we have until July 20, 2009 to regain compliance with this requirement, which requires our stock to have a minimum closing bid price of $1.00 for at least 10 consecutive trading days. If we fail to regain compliance with the minimum bid price requirement by July 20, 2009, Nasdaq has informed us we will be eligible for an additional 180 calendar day compliance period if we satisfy the Nasdaq Capital Market initial listing criteria other than the minimum bid price requirement at that time. While we believe we currently meet the Nasdaq Capital Market initial listing criteria other than the minimum bid price requirement, there can be no assurance we will meet these criteria in the future, that Nasdaq will interpret these criteria in the same manner we do, or that Nasdaq will not change such criteria to include requirements we do not meet in the future, any of which could cause us to fail to obtain the additional 180 day compliance period. In addition, we may be delisted before July 20, 2009 if we fail to comply with other Nasdaq Capital Markets listing requirements. If we are delisted from the Nasdaq Capital Market, our common stock may be considered a penny stock under the regulations of the SEC and would therefore be subject to rules that impose additional sales practice requirements on broker-dealers who sell our securities. The additional burdens imposed upon broker-dealers may discourage broker-dealers from effecting transactions in our common stock, which could severely limit market liquidity of the common stock and your ability to sell our securities in the secondary market. This lack of liquidity would also make it more difficult for us to raise capital in the future.

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We rely substantially on third-party suppliers. The loss of products or delays in product availability from one or more third-party supplier could substantially harm our business.

To be successful, we must contract for the supply of, or manufacture ourselves, current and future products of appropriate quantity, quality and cost. Such products must be available on a timely basis and be in compliance with any regulatory requirements. Failure to do so could substantially harm our business.

We rely on third party suppliers to manufacture those products we do not manufacture ourselves. Proprietary products provided by these suppliers represent a majority of our product revenue. We currently rely on these suppliers for our veterinary instruments and consumable supplies for these instruments, for our point-of-care diagnostic and other tests, for the manufacture of our allergy immunotherapy treatment products as well as for the manufacture of other products. Major suppliers who sell us proprietary products which are responsible for more than 5% of our trailing 12-month product revenue are Arkray Global Business, Inc., Boule Medical AB, FUJIFILM Corporation, i-STAT Corporation (a unit of Abbott Laboratories) and Quidel Corporation. None of these suppliers sell us proprietary products which are responsible for more than 20% of our trailing 12-month product revenue, although the proprietary products of one is responsible for more than 15% of our revenue and one other is responsible for more than 10% of our revenue. We often purchase products from our suppliers under agreements that are of limited duration or potentially can be terminated on an annual basis. In the case of our veterinary diagnostic instruments, we are typically entitled to non-exclusive access to consumable supplies for a defined period upon expiration of exclusive rights, which could subject us to competitive pressures in the period of non-exclusive access. Although we believe we have arrangements to ensure supply of our major product offerings in the marketplace through at least the end of 2008, there can be no assurance that our suppliers will meet their obligations under any agreements we may have in place with them or that we will be able to compel them to do so. Risks of relying on suppliers include:

• Loss of exclusivity. In the case of our veterinary diagnostic instruments, if we are entitled to non-exclusive access to consumable supplies for a defined period upon expiration of exclusive rights, we may face increased competition from a third party with similar non-exclusive access or our former supplier, which could cause us to lose customers and/or significantly decrease our margins and could significantly affect our financial results. In addition, current agreements, or agreements we may negotiate in the future, with suppliers may require us to meet minimum annual sales levels to maintain our position as the exclusive distributor of these products. We may not meet these minimum sales levels and maintain exclusivity over the distribution and sale of these products. If we are not the exclusive distributor of these products, competition may increase significantly, reducing our revenues and/or decreasing our margins.

• The loss of product rights upon expiration or termination of an existing agreement. Unless we are able to find an alternate supply of a similar product, we would not be able to continue to offer our customers the same breadth of products and our sales and operating results would likely suffer. In the case of an instrument supplier, we could also potentially suffer the loss of sales of consumable supplies, which would be significant in cases where we have built a significant installed base, further harming our sales prospects and opportunities. Even if we were able to find an alternate supply for a product to which we lost rights, we would likely face increased competition from the product whose rights we lost being marketed by a third party or the former supplier and it may take us additional time and expense to gain the necessary approvals and launch an alternative product.

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• High switching costs. In our diagnostic instrument products we could face significant competition and lose all or some of the consumable revenues from the installed base of those instruments if we were to switch to a competitive instrument. If we need to change to other commercial manufacturing contractors for certain of our regulated products, additional regulatory licenses or approvals must be obtained for these contractors prior to our use. This would require new testing and compliance inspections prior to sale thus resulting in potential delays. Any new manufacturer would have to be educated in, or develop substantially equivalent processes necessary for the production of our products. We likely would have to train our sales force, distribution network employees and customer support organization on the new product and spend significant funds marketing the new product to our customer base.

• Inability to meet minimum obligations. Current agreements, or agreements we may negotiate in the future, may commit us to certain minimum purchase or other spending obligations. It is possible we will not be able to create the market demand to meet such obligations, which could create a drain on our financial resources and liquidity. Some such agreements may require minimum purchases and/or sales to maintain product rights and we may be significantly harmed if we are unable to meet such requirements and lose product rights.

• The involuntary or voluntary discontinuation of a product line. Unless we are able to find an alternate supply of a similar product in this or similar circumstances with any product, we would not be able to continue to offer our customers the same breadth of products and our sales would likely suffer. Even if we are able to identify an alternate supply, it may take us additional time and expense to gain the necessary approvals and launch an alternative product, especially if the product is discontinued unexpectedly. An example of such a situation arose in 2006 when Dolphin Medical Inc. (a majority-owned subsidiary of OSI Systems, Inc.) discontinued production of our VET/OX G2 DIGITAL Monitor as part of an agreement with Masimo Corporation to settle a patent dispute.

• Inconsistent or inadequate quality control. We may not be able to control or adequately monitor the quality of products we receive from our suppliers. Poor quality items could damage our reputation with our customers.

• Limited capacity or ability to scale capacity. If market demand for our products increases suddenly, our current suppliers might not be able to fulfill our commercial needs, which would require us to seek new manufacturing arrangements and may result in substantial delays in meeting market demand. If we consistently generate more demand for a product than a given supplier is capable of handling, it could lead to large backorders and potentially lost sales to competitive products that are readily available. This could require us to seek or fund new sources of supply, which may be difficult to find unless it is under terms that are less advantageous.

• Regulatory risk. Our manufacturing facility and those of some of our third party suppliers are subject to ongoing periodic unannounced inspection by regulatory authorities, including the FDA, USDA and other federal and state agencies for compliance with strictly enforced Good Manufacturing Practices, regulations and similar foreign standards, and we do not have control over our suppliers' compliance with these regulations and standards. Violations could potentially lead to interruptions in supply that could cause us to lose sales to readily available competitive products.

• Developmental delays. We may experience delays in the scale-up quantities needed for product development that could delay regulatory submissions and commercialization of our products in development, causing us to miss key opportunities.

• Limited intellectual property rights. We typically do not have intellectual property rights, or may have to share intellectual property rights, to the products themselves and any improvements to the manufacturing processes or new manufacturing processes for our products.

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Potential problems with suppliers such as those discussed above could substantially decrease sales, lead to higher costs, damage our reputation with our customers due to factors such as poor quality goods or delays in order fulfillment, resulting in our being unable to effectively sell our products and substantially harm our business.

We may be unable to successfully market and sell our products.

We may not successfully develop and maintain marketing and/or sales capabilities, and we may not be able to make arrangements with third parties to perform these activities on satisfactory terms. If our marketing and sales strategy is unsuccessful, our ability to sell our products will be negatively impacted and our revenues will decrease.

The market for companion animal healthcare products is highly fragmented. Because our Core Companion Animal Health proprietary products are generally available only to veterinarians or by prescription and our medical instruments require technical training to operate, we ultimately sell our Core Companion Animal Health products predominantly to or through veterinarians. The acceptance of our products by veterinarians is critical to our success. Changes in our ability to obtain or maintain such acceptance or changes in veterinary medical practice could significantly decrease our anticipated sales.

We currently sell most of our Core Companion Animal Health products in the United States to veterinarians through an outside sales force of approximately 39 individuals, an inside sales force of approximately 22 individuals, approximately 12 independent third-party distributors who carry our full distribution product line and approximately 7 independent third-party distributors who carry portions of our distribution product line. To be successful in these endeavors, we will have to effectively market our products and continue to develop and train our direct sales force as well as the sales personnel of our independent third-party distributors.

Independent third-party distributors may be effective in increasing sales of our products to veterinarians, although we would expect a corresponding lower gross margin as such distributors typically buy products from us at a discount to end user prices. It is possible new or existing independent third-party distributors could cannibalize our direct sales efforts and lower our total gross margin. For us to be effective when working with an independent third-party distributor, the distributor must agree to market and/or sell our products and we must provide proper economic incentives to the distributor as well as contend effectively for the distributor's time and focus given other products the distributor may be carrying, potentially including those of our competitors. If we fail to be effective with new or existing independent third-party distributors, our financial performance may suffer. In addition, most of our independent third-party distributor agreements can be terminated on 60 days notice and we believe that IDEXX, one of our largest competitors, in effect prohibits its distributors from selling competitive products, including our diagnostic instruments and heartworm diagnostic tests. We believe this restriction limits our ability to engage national independent third-party distributors to sell our full distribution line of products. In the second quarter of 2005, our largest distributor purchased an IDEXX distributor and subsequently informed us that they no longer would carry our instruments and heartworm diagnostic tests. We

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believe IDEXX in effect prohibits this distributor from carrying our diagnostic instruments and heartworm diagnostic tests as a condition for having access to buy the IDEXX product line.

If the third parties to whom we granted substantial marketing rights for certain of our existing products or future products under development are not successful in marketing those products, then our sales and financial position may suffer.

Our agreements with our corporate marketing partners generally contain no or small minimum purchase requirements in order for them to maintain their exclusive or co-exclusive marketing rights. We are party to an agreement with SPAH which grants distribution and marketing rights in the U.S. for our canine heartworm preventive product, TRI-HEART Plus Chewable Tablets. AgriLabs has the exclusive right to sell certain of our bovine vaccines in the United States, Africa and Mexico. Novartis Japan markets and distributes our SOLO STEP CH heartworm test and our E.R.D. Healthscreen urine test products in Japan under an exclusive arrangement. One or more of these marketing partners may not devote sufficient resources to marketing our products. Furthermore, there may be nothing to prevent these partners from pursuing alternative technologies or products that may compete with our products in current or future agreements. For example, we believe a unit of SPAH has obtained FDA approval for a canine heartworm preventive product with additional claims compared with our TRI-HEART Plus Chewable Tablets. Should SPAH decide to emphasize sales and marketing efforts of this product rather than our TRI-HEART Plus Chewable Tablets or cancel our agreement regarding canine heartworm preventive distribution and marketing, our sales could decline significantly. In the future, third-party marketing assistance may not be available on reasonable terms, if at all. If any of these events occur, we may not be able to commercialize our products and our sales will decline. In addition, both our agreements with SPAH and AgriLabs require us to potentially pay penalties if we are unable to supply product over an extended period of time.

We operate in a highly competitive industry, which could render our products obsolete or substantially limit the volume of products that we sell. This would limit our ability to compete and maintain sustained profitability.

The market in which we compete is intensely competitive. Our competitors include independent animal health companies and major pharmaceutical companies that have animal health divisions. We also compete with independent, third-party distributors, including distributors who sell products under their own private labels. In the point-of-care diagnostic testing market, our major competitors include IDEXX, Abaxis, Inc. and Synbiotics Corporation. The products manufactured by our OVP segment for sale by third parties compete with similar products offered by a number of other companies, some of which have substantially greater financial, technical, research and other resources than us and may have more established marketing, sales, distribution and service organizations than our OVP segment's customers. Competitors may have facilities with similar capabilities to our OVP segment, which they may operate and sell at a lower unit price to customers than our OVP segment does, which could cause us to lose customers. Companies with a significant presence in the companion animal health market, such as Bayer AG, CEVA Santé Animale, Merial Limited, Novartis AG, Pfizer Inc., Schering-Plough Corporation, Vétoquinol S.A., Virbac S.A. and Wyeth, may be marketing or developing products that compete with our products or would compete with them if developed. These and other competitors and potential competitors may have substantially greater financial, technical, research and other resources and larger, more established marketing, sales and service organizations than we do. Our competitors may offer broader product lines and have greater name recognition than we do. Our competitors may develop or market technologies or products that are more effective or commercially attractive than our current or future products or that would render our technologies and products obsolete. Further, additional competition could come from new entrants to the animal health care market. Moreover, we may not have the financial resources, technical expertise or marketing, sales or support capabilities to compete successfully. We believe that one of our largest competitors, IDEXX, in effect prohibits its distributors from selling competitive products, including our diagnostic instruments and heartworm diagnostic tests. If we fail to compete successfully, our ability to achieve sustained profitability will be limited and sustained profitability, or profitability at all, may not be possible.

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We may not be able to continue to achieve sustained profitability or increase profitability on a quarterly or annual basis.

Prior to 2005, we incurred net losses on an annual basis since our inception in 1988 and, as of September 30, 2008, we had an accumulated deficit of $172.2 million. We have achieved only one quarter with income before income taxes greater than $1.5 million. Accordingly, relatively small differences in our performance metrics may cause us to lose money in future periods. Our ability to continue to be profitable in future periods will depend, in part, on our ability to increase sales in our Core Companion Animal Health segment, including maintaining and growing our installed base of instruments and related consumables, to maintain or increase gross margins and to limit the increase in our operating expenses to a reasonable level as well as avoid or effectively manage any unanticipated issues. We may not be able to sustain or increase profitability on a quarterly or annual basis. If we cannot achieve or sustain profitability for an extended period, we may not be able to fund our expected cash needs, including the repayment of debt as it comes due, or continue our operations.

We have historically not consistently generated positive cash flow from operations, may need additional capital and any required capital may not be available on reasonable terms or at all.

If our actual performance deviates from our operating plan, we may be required to raise additional capital in the future. If necessary, we expect to raise these additional funds by the sale of equity securities or refinancing loans currently outstanding on assets with historical appraised values in excess of related debt. There is no guarantee that additional capital will be available from these sources on reasonable terms, if at all, and certain of these sources may require approval by existing lenders. The public markets may be unreceptive to equity financings and we may not be able to obtain additional private equity or debt financing. Any equity financing would likely be dilutive to stockholders and additional debt financing, if available, may include restrictive covenants and increased interest rates that would limit our currently planned operations and strategies. Additionally, funds we expect to be available under our existing revolving line of credit may not be available and other lenders could refuse to provide us with additional debt financing. Furthermore, even if additional capital is available, it may not be of the magnitude required to meet our needs under these or other scenarios. If additional funds are required and are not available, it would likely have a material adverse effect on our business, financial condition and our ability to continue as a going concern.

We often depend on third parties for products we intend to introduce in the future. If our current relationships and collaborations are not successful, we may not be able to introduce the products we intend to in the future.

We are often dependent on third parties and collaborative partners to successfully and timely perform research and development activities to successfully develop new products. For example, we jointly developed point-of-care diagnostic products with Quidel Corporation. In other cases, we have discussed Heska marketing in the veterinary market an instrument being developed by a third party for use in the human health care market. In the future, one or more of these third parties or collaborative partners may not complete research and development activities in a timely fashion, or at all. Even if these third parties are successful in their research and development activities, we may not be able to come to an economic agreement with them. If these third parties or collaborative partners fail to complete research and development activities, fail to complete them in a timely fashion, or if we are unable to negotiate economic agreements with such third parties or collaborative partners, our ability to introduce new products will be impacted negatively and our revenues may decline.

Many of our expenses are fixed and if factors beyond our control cause our revenue to fluctuate, this fluctuation could cause greater than expected losses, cash flow and liquidity shortfalls.

We believe that our future operating results will fluctuate on a quarterly basis due to a variety of factors which are generally beyond our control, including:

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• supply of products from third-party suppliers or termination, cancellation or expiration of such relationships;

• the introduction of new products by our competitors or by us;

• competition and pricing pressures from competitive products;

• our ability to maintain relationships with independent third-party distributors;

• large customers failing to purchase at historical levels, including changes in independent third-party distributor purchasing patterns and inventory levels;

• fundamental shifts in market demand;

• manufacturing delays;

• shipment problems;

• information technology problems, which may prevent us from conducting our business effectively, or at all, and may also raise our costs;

• regulatory and other delays in product development;

• product recalls or other issues which may raise our costs;

• changes in our reputation and/or market acceptance of our current or new products; and

• changes in the mix of products sold.

We have high operating expenses for personnel and marketing. Many of these expenses are fixed in the short term. If any of the factors listed above cause our revenues to decline, our operating results could be substantially harmed.

The loss of significant customers could harm our operating results.

Sales to no single customer accounted for more than 10% of our consolidated revenue for the three and nine month periods ended September 30, 2008 and September 30, 2007.  SPAH accounted for approximately 13% and 11% of our consolidated accounts receivable at September 30, 2008 and 2007, respectively. No other customer accounted for more than 10% of accounts receivable at September 30, 2008 or 2007.  The loss of significant customers who, for example, are historically large purchasers or who are considered leaders in their field could damage our business and financial results.

Our stock price has historically experienced high volatility, which may increase in the future, and which could affect our ability to raise capital in the future or make it difficult for investors to sell their shares.

The securities markets have experienced significant price and volume fluctuations and the market prices of securities of many microcap and smallcap companies have in the past been, and can in the future be expected to be, especially volatile. During the past 12 months, our closing stock price has ranged from a low of $0.36 to a high of $2.10. Fluctuations in the trading price or liquidity of our common stock may adversely affect our ability to raise capital through future equity financings. Factors that may have a significant impact on the market price and marketability of our common stock include:

• stock sales by large stockholders or by insiders;

• changes in the outlook for our business, including any changes in our earnings guidance;

• our quarterly operating results, including as compared to our revenue, earnings or other guidance and in comparison to historical results;

• termination, cancellation or expiration of our third-party supplier relationships;

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• announcements of technological innovations or new products by our competitors or by us;

• litigation;

• regulatory developments, including delays in product introductions;

• developments or disputes concerning patents or proprietary rights;

• availability of our revolving line of credit and compliance with debt covenants;

• releases of reports by securities analysts;

• changes in regulatory policies;

• economic and other external factors; and

• general market conditions.

In the past, following periods of volatility in the market price of a company's securities, securities class action litigation has often been instituted. If a securities class action suit is filed against us, it is likely we would incur substantial legal fees and our management's attention and resources would be diverted from operating our business in order to respond to the litigation.

Our future revenues depend on successful product development, commercialization and/or market acceptance, any of which can be slower than we expect or may not occur.

The product development and regulatory approval process for many of our potential products is extensive and may take substantially longer than we anticipate. Research projects may fail. New products that we are developing for the veterinary marketplace may not perform up to our expectations. Because we have limited resources to devote to product development and commercialization, any delay in the development of one product or reallocation of resources to product development efforts that prove unsuccessful may delay or jeopardize the development of other product candidates. If we fail to successfully develop new products and bring them to market in a timely manner, our ability to generate additional revenue will decrease.

Even if we are successful in the development of a product or obtain rights to a product from a third-party supplier, we may experience delays in commercialization and/or market acceptance of the product. For example, veterinarians may be slow to adopt a product or there may be delays in producing large volumes of a product. The former is particularly likely where there is no comparable product available or historical use of such a product. For example, while we believe our E.R.D.-HEALTHSCREEN urine tests for dogs and cats represent a significant scientific breakthrough in companion animal annual health examinations, these products have achieved significantly lower market acceptance than we anticipated. The ultimate adoption of a new product by veterinarians, the rate of such adoption and the extent veterinarians choose to integrate such a product into their practice are all important factors in the economic success of one of our new products and are factors that we do not control to a large extent. If our products do not achieve a significant level of market acceptance, demand for our products will not develop as expected and our revenues will be lower than we anticipate.

Obtaining and maintaining regulatory approvals in order to market our regulated products may be costly and delay the marketing and sales of our products.

Many of the products we develop, market or manufacture are subject to extensive regulation by one or more of the USDA, the FDA, the EPA and foreign and other regulatory authorities. These regulations govern, among other things, the development, testing, manufacturing, labeling, storage, pre-market approval, advertising, promotion and sale of some of our products. Satisfaction of these requirements can take several years and time needed to satisfy them may vary substantially, based on the type, complexity and novelty of the product.

The effect of government regulation may be to delay or to prevent marketing of our products for a considerable period of time and to impose costly procedures upon our activities. We have experienced in the past, and may experience in the future, difficulties that could delay or prevent us from obtaining the regulatory

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approval or license necessary to introduce or market our products. Such delays in approval may cause us to forego a significant portion of a new product's sales in its first year due to seasonality and advanced booking periods associated with certain products. Regulatory approval of our products may also impose limitations on the indicated or intended uses for which our products may be marketed.

Among the conditions for certain regulatory approvals is the requirement that our facilities and/or the facilities of our third party manufacturers conform to current Good Manufacturing Practices and other requirements. If any regulatory authority determines that our manufacturing facilities or those of our third party manufacturers do not conform to appropriate manufacturing requirements, we or the manufacturers of our products may be subject to sanctions, including, but not limited to, warning letters, manufacturing suspensions, product recalls or seizures, injunctions, refusal to permit products to be imported into or exported out of the United States, refusals of regulatory authorities to grant approval or to allow us to enter into government supply contracts, withdrawals of previously approved marketing applications, civil fines and criminal prosecutions. In addition, certain of our agreements require us to pay penalties if we are unable to supply products, including for failure to maintain regulatory approvals. Any of these events, alone or in unison, could damage our business.

Interpretation of existing legislation, regulations and rules or implementation of future legislation, regulations and rules could cause our costs to increase or could harm us in other ways.

The Sarbanes-Oxley Act of 2002 ("Sarbanes-Oxley") has increased our required administrative actions as a public company. The increase in general and administrative costs of complying with Sarbanes-Oxley will depend on how it is interpreted over time. Of particular concern are the level and timing of standards for internal control evaluation and reporting adopted under Section 404 of Sarbanes-Oxley. If our regulators and/or auditors adopt or interpret more stringent standards than we are anticipating, we and/or our auditors may be unable to conclude that our internal controls over financial reporting are designed and operating effectively, which could adversely affect investor confidence in our financial statements. Even if we and our auditors are able to conclude that our internal controls over financial reporting are designed and operating effectively in such a circumstance, our general and administrative costs are likely to increase. Thus, our general and administrative costs increased in 2007 from what they would have been in the absence of Sarbanes-Oxley and may increase in the future. In addition, actions by other entities, such as enhanced rules to maintain our listing on the Nasdaq Capital Market, could also increase our general and administrative costs or have other adverse effects on us, as could further legislative, regulatory or rule-making action or more stringent interpretations of existing legislation, regulations and rules.

We may face costly legal disputes, including related to our intellectual property or technology or that of our suppliers or collaborators.

We may face legal disputes related to our business. Even if meritless, these disputes may require significant expenditures on our part and could entail a significant distraction to members of our management team or other key employees. A legal dispute leading to an unfavorable ruling or settlement could have significant material adverse consequences on our business.

We may become subject to additional patent infringement claims and litigation in the United States or other countries or interference proceedings conducted in the United States Patent and Trademark Office, or USPTO, to determine the priority of inventions. The defense and prosecution of intellectual property suits, USPTO interference proceedings and related legal and administrative proceedings are likely to be costly, time-consuming and distracting. As is typical in our industry, from time to time we and our collaborators and suppliers have received, and may in the future receive, notices from third parties claiming infringement and invitations to take licenses under third party patents. Any legal action against us or our collaborators or suppliers may require us or our collaborators or suppliers to obtain one or more licenses in order to market or manufacture affected products or services. However, we or our collaborators or suppliers may not be able to obtain licenses for technology patented by others on commercially reasonable terms, or at all, may not be able to develop alternative approaches if unable to obtain licenses or current and future licenses may not be adequate, any of

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which could substantially harm our business. An example of such a situation arose in 2006 when Dolphin Medical Inc. (a majority-owned subsidiary of OSI Systems, Inc.) discontinued production of our VET/OX G2 DIGITAL Monitor as part of an agreement with Masimo Corporation to settle a patent dispute.

We may also need to pursue litigation to enforce any patents issued to us or our collaborative partners, to protect trade secrets or know-how owned by us or our collaborative partners, or to determine the enforceability, scope and validity of the proprietary rights of others. Any litigation or interference proceeding will likely result in substantial expense to us and significant diversion of the efforts of our technical and management personnel. Any adverse determination in litigation or interference proceedings could subject us to significant liabilities to third parties. Further, as a result of litigation or other proceedings, we may be required to seek licenses from third parties which may not be available on commercially reasonable terms, if at all.

Changes to financial accounting standards may affect our results of operations and cause us to change our business practices.

We prepare our financial statements in conformance with United States generally accepted accounting principles, or GAAP. These accounting principles are established by and are subject to interpretation by the SEC, the Financial Accounting Standards Board, the American Institute of Certified Public Accountants, and others who interpret and create accounting policies. A change in those policies can have a significant effect on our reported results and may affect our reporting of transactions completed before a change is made effective. Such changes may adversely affect our reported financial results or the way we conduct our business.

We depend on key personnel for our future success. If we lose our key personnel or are unable to attract and retain additional personnel, we may be unable to achieve our goals.

Our future success is substantially dependent on the efforts of our senior management and other key personnel. The loss of the services of members of our senior management or other key personnel may significantly delay or prevent the achievement of our business objectives. Although we have an employment agreement with many of these individuals, all are at-will employees, which means that either the employee or Heska may terminate employment at any time without prior notice. If we lose the services of, or fail to recruit, key personnel, the growth of our business could be substantially impaired. We do not maintain key person life insurance for any of our senior management or key personnel.

We may face product returns and product liability litigation in excess of or not covered by our insurance coverage or indemnities and/or warranties from our suppliers. If we become subject to product liability claims resulting from defects in our products, we may fail to achieve market acceptance of our products and our sales could substantially decline.

The testing, manufacturing and marketing of our current products as well as those currently under development entail an inherent risk of product liability claims and associated adverse publicity. Following the introduction of a product, adverse side effects may be discovered. Adverse publicity regarding such effects could affect sales of our other products for an indeterminate time period. To date, we have not experienced any material product liability claims, but any claim arising in the future could substantially harm our business. Potential product liability claims may exceed the amount of our insurance coverage or may be excluded from coverage under the terms of the policy. We may not be able to continue to obtain adequate insurance at a reasonable cost, if at all. In the event that we are held liable for a claim against which we are not indemnified or for damages exceeding the $10 million limit of our insurance coverage or which results in significant adverse publicity against us, we may lose revenue, be required to make substantial payments which could exceed our financial capacity and/or lose or fail to achieve market acceptance.

31

We may be held liable for the release of hazardous materials, which could result in extensive clean up costs or otherwise harm our business.

Certain of our products and development programs produced at our Des Moines, Iowa facility involve the controlled use of hazardous and biohazardous materials, including chemicals and infectious disease agents. Although we believe that our safety procedures for handling and disposing of such materials comply with the standards prescribed by applicable local, state and federal regulations, we cannot eliminate the risk of accidental contamination or injury from these materials. In the event of such an accident, we could be held liable for any fines, penalties, remediation costs or other damages that result. Our liability for the release of hazardous materials could exceed our resources, which could lead to a shutdown of our operations, significant remediation costs and potential legal liability. In addition, we may incur substantial costs to comply with environmental regulations if we choose to expand our manufacturing capacity.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3. Defaults upon Senior Securities

None.

Item 4. Submission of Matters to a Vote of Security Holders

None.

Item 5. Other Information

None.

32

Item 6. Exhibits

(a) Exhibits

Number Notes Description

10.1 * Fourth and Fifth Amendments to Third Amended and Restated Credit and Security Agreement between Registrant, Diamond Animal Health, Inc. and Wells Fargo Bank, National Association, dated October 16, 2008.

10.2 * Letter Amendment to Supply and Distribution Agreement between Registrant and Boule Medical AB, dated July 12, 2005; Letter Amendment to Supply and Distribution Agreement between Registrant and Boule Medical AB, dated March 20, 2007; Letter Amendment to Supply and Distribution Agreement between Registrant and Boule Medical AB, dated January 23, 2008; and Sixth Amendment to Supply and Distribution Agreement between Registrant and Boule Medical AB, dated October 1, 2008.

31.1 Certification of Chief Executive Officer Pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended.

31.2 Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended.

32.1 Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Notes

* Confidential treatment has been requested with respect to certain portions of this agreement.

33

HESKA CORPORATION

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

HESKA CORPORATION

Date:	November 10, 2008	By	/s/ Robert B. Grieve
			ROBERT B. GRIEVE
			Chairman of the Board and Chief Executive Officer (on behalf of the Registrant and as the Registrant's Principal Executive Officer)
Date:	November 10, 2008	By	/s/ Jason A. Napolitano
			JASON A. NAPOLITANO
			Executive Vice President and Chief Financial Officer (on behalf of the Registrant and as the Registrant's Principal Financial Officer)

34

EX-10

Exhibit 10.1

[***] – Certain information in this exhibit have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

FOURTH AMENDMENT TO THIRD AMENDED AND RESTATED

CREDIT AND SECURITY AGREEMENT

This Amendment, dated as of October 16, 2008, is made by and between Heska Corporation, a Delaware corporation ("Heska"), Diamond Animal Health, Inc., an Iowa corporation ("Diamond") (each of Heska and Diamond may be referred to herein individually as a "Borrower" and collectively as the "Borrowers"), and Wells Fargo Bank, National Association, operating through its Wells Fargo Business Credit operating division (the "Lender").

Recitals

The Borrowers and the Lender are parties to a Third Amended and Restated Credit and Security Agreement dated as of December 30, 2005, (as amended to date and as the same may be hereafter amended from time to time, the "Credit Agreement").

The Borrowers have requested that certain amendments be made to the Credit Agreement, which the Lender is willing to make pursuant to the terms and conditions set forth herein.

NOW, THEREFORE, in consideration of the premises and of the mutual covenants and agreements herein contained, it is agreed as follows:

1.   Defined Terms. Capitalized terms used in this Amendment which are defined in the Credit Agreement shall have the same meanings as defined therein, unless otherwise defined herein. In addition, Section 1.1 of the Credit Agreement is amended by adding or amending, as the case may be, the following definitions:

"Maturity Date" means, (i) with respect to the Term B Advances, June 30, 2009; provided, however if the Lender receives an updated valuation of the Mortgaged Property, as defined in each of the Factory Mortgage and the Farm Mortgage, acceptable to the Lender, in the Lender's sole discretion, "Maturity Date" with respect to the Term B Advances shall mean May 30, 2010, and (ii) with respect to all other Advances, June 30, 2011.

"Prepayment Factor" means one percent (1%) through and including June 30, 2009, and one half of one percent (0.50%) thereafter.

"Prior Year Capital Base" for a given fiscal year means the amount of Heska's Capital as of December 31 of the prior fiscal year, as reflected on Heska's internally prepared financial statements; provided, however that such amount shall adjust upwards or downwards, respectively on a dollar-for-dollar basis by an

amount equal to the amount by which Heska's Capital, as evidenced by Heska's audited balance sheet as of December 31 of such year, differs from the amount of Capital reflected on Heska's internally prepared financial statements for such date.

2.   Spread. Section 2.7 of the Credit Agreement is hereby amended to read in its entirety as follows:

"Section 2.7    Spread. The spread (the "Spread") means the percentage set forth in the table below opposite the applicable prior-fiscal-year Net Income of the Borrowers, which percentage shall change annually effective as of the first day of the month following the month in which the Borrowers delivers to the Lender their audited financial statements for the prior fiscal year (amounts in parentheses denote negative numbers); provided, however, that in no case shall any decrease in the Spread occur during a Default Period:

Prior Fiscal Year Net Income	Spread
Less than $0	2.00%
Greater than or equal to $0 but less than $2,500,000	1.00%
Greater than or equal to $2,500,000 but less than $5,000,000	0.00%
Greater than or equal to $5,000,000	(0.05%)"

3.   Audit Fees. Section 2.9(b) of the Credit Agreement is hereby amended to read it its entirety as follows:

"(b)     Audit Fees. The Borrowers shall pay the Lender fees in connection with any collateral exams, audits or inspections conducted by or on behalf of the Lender of any Collateral or the Borrowers' operations or business at the rates established from time to time by the Lender as its collateral exam fees (which fees are currently $125 per hour per collateral examiner), together with all actual out-of-pocket costs and expenses incurred in conducting any such collateral examination or inspection; provided, however, that so long as no Default Period exists and average Availability (computed on a 90-day rolling average basis, as reasonably determined by the Lender) exceeds $2,000,000 the Lender will not demand reimbursement for more than two such collateral exams in any calendar year."

4.   Financial Covenants. Sections 6.12, 6.13 and 6.16 of the Credit Agreement are hereby amended to read in their entireties as follows:

"Section 6.12 Minimum Capital. Heska will maintain, on a consolidated basis, as of each date listed below, its Capital at an amount not less than the amount set forth opposite such date:

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Date	Minimum Capital
July 31, 2008	[***]
August 31, 2008	[***]
September 30, 2008	[***]
October 31, 2008	[***]
November 30, 2008	[***]
December 31, 2008	[***]

            After December 31, 2008, Heska will maintain, on a consolidated basis, as of each date listed below, its Capital at an amount not less than the Prior Year Capital Base plus the minimum capital factor set forth opposite such date (amounts in parentheses denote negative numbers):

Date	Minimum Capital Factor
January 31	[***]
February 28	[***]
March 31	[***]
April 30	[***]
May 31	[***]
June 30	[***]
July 31	[***]
August 31	[***]
September 30	[***]
October 31	[***]
November 30	[***]
December 31	[***]

Provided, however, that the covenant levels set forth in this Section 6.12 shall be adjusted upwards or downwards, respectively on a dollar-for-dollar basis, by an amount equal to the dollar amount paid by Heska for the redemption or repurchase of shares of its capital stock as permitted by Section 7.5(c), from the date Heska redeems or repurchases the shares through the end of the fiscal year in which such redemption or repurchase occurs."

"Section 6.13 Minimum Net Income. Heska will achieve, on a consolidated basis, during each period described below, Net Income in an amount not less than the amount set forth opposite such period (amounts in parentheses denote negative numbers):

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Period	Minimum Net Income
Three months ending March 31 of each fiscal year	[***]
Six months ending June 30 of each fiscal year	[***]
Nine months ending September 30 of each fiscal year	[***]
Twelve months ending December 31 of each fiscal year	[***]

"Section 6.16 [Reserved]."

5.   Investments. Clause (v) of Section 7.4(a) of the Credit Agreement is hereby amended to read in its entirety as follows:

"(v)    unless a Default Period exists or would exist immediately after or as a result of any such advance or contribution, advances or contributions by Heska to any Subsidiary that is not a Borrower; provided, however, that (A) both before and after such advance or contribution Heska's Tangible Net Worth must equal or exceed $100,000 and (B) all contributions and advances made in reliance on this subsection (v) shall not exceed $700,000 in the aggregate in any fiscal year;"

6.   Stock Repurchase. Section 7.5 of the Credit Agreement is hereby amended to read in its entirety as follows:

"Section 7.5    Dividends. Such Borrower will not declare or pay any dividends (other than dividends payable solely in stock of such Borrower) on any class of its stock or make any payment on account of the purchase, redemption or other retirement of any shares of such stock or make any distribution in respect thereof, either directly or indirectly; provided, however, that so long as no Default Period then exists or would occur immediately following or as a result of such action, (a) any Borrower that is a Subsidiary of Heska may pay dividends to Heska so long as such Subsidiary's Tangible Net Worth both before and after such dividend equals or exceeds $100,000; (b) Heska may repurchase capital stock of Heska held by any employee provided Heska is required to do so pursuant to any employee equity subscription agreement, stock ownership plan or stock option agreement in effect from time to time; and provided further that the aggregate price paid for all such repurchased, redeemed, acquired or retired capital shall not exceed $100,000 during any fiscal year; and (c) Heska may repurchase capital stock of Heska held by [***] or any other shareholder of Heska who is not an

-4-

officer of Heska, provided that Availability (assuming for purposes of such calculation, that such redemption had already been made) during the 90 days prior to and immediately following such redemption is greater than $1,750,000 at all times; and provided further that the aggregate price paid for all such repurchased, redeemed, acquired or retired capital shall not exceed $2,000,000 through the Maturity Date of the Revolving Advance. Notwithstanding the foregoing, the exercise of stock options for the purchase of Heska's capital stock shall not, by means of any deemed repurchase of shares as a result of a cashless exercise or otherwise, cause a breach of this Section 7.5.

7.   Capital Expenditures. Section 7.10 of the Credit Agreement is hereby amended to read in its entirety as follows:

"Section 7.10 Capital Expenditures. The Borrowers, together with any Affiliates, will not incur or contract to incur, in the aggregate, Capital Expenditures in the aggregate during the fiscal year-to-date period ending on any date described below in excess of the amount set forth opposite such date:

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Period	Maximum Capital Expenditures
July 31, 2008	[***]
August 31, 2008	[***]
September 30, 2008	[***]
October 31, 2008	[***]
November 30, 2008	[***]
December 31, 2008	[***]
January 31 of each fiscal year thereafter	[***]
February 28 of each fiscal year thereafter	[***]
March 31 of each fiscal year thereafter	[***]
April 30 of each fiscal year thereafter	[***]
May 31 of each fiscal year thereafter	[***]
June 30 of each fiscal year thereafter	[***]
July 31 of each fiscal year thereafter	[***]
August 31 of each fiscal year thereafter	[***]
September 30 of each fiscal year thereafter	[***]
October 31 of each fiscal year thereafter	[***]
November 30 of each fiscal year thereafter	[***]
December 31 of each fiscal year thereafter	[***]

In addition to the foregoing, the amounts set forth above shall be adjusted upward on a dollar-for-dollar basis by the amount allocated for such purpose in accordance with Section 2.22, from the date of such increase through the end of the fiscal year in which such increase occurs."

8.   Compliance Certificate. Exhibit B to the Credit Agreement is replaced in its entirety by Exhibit A to this Amendment for periods ending during fiscal year 2008, and by Exhibit B to this Amendment for all periods thereafter.

9.   No Other Changes. Except as explicitly amended by this Amendment, all of the terms and conditions of the Credit Agreement shall remain in full force and effect and shall apply to any advance or letter of credit thereunder.

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10. Waiver of Defaults. The Borrowers are in default of Section 6.1(f) of the Credit Agreement as of May 31, 2008, as a result of their failure to deliver projected balance sheets and income statements for each of the subsequent twelve months to the Lender (the "Existing Default"). Upon the terms and subject to the conditions set forth in this Amendment, the Lender hereby waives the Existing Default. This waiver shall be effective only in this specific instance and for the specific purpose for which it is given, and this waiver shall not entitle the Borrowers to any other or further waiver in any similar or other circumstances.

11. Conditions Precedent. This Amendment shall be effective when the Lender shall have received an executed original hereof, together with the following, each in form and substance acceptable to the Lender in its sole discretion:

(a)       A Certificate of Authority of the Borrowers certifying as to the resolutions of the boards of directors of the Borrowers approving the execution and delivery of this Amendment.

(b)       Such other matters as the Lender may require.

12. Representations and Warranties. The Borrowers hereby represent and warrant to the Lender as follows:

(a)       The Borrowers have all requisite power and authority to execute this Amendment and the Replacement Notes and to perform all of its obligations hereunder, and this Amendment and the Replacement Notes have been duly executed and delivered by the Borrowers and constitute the legal, valid and binding obligation of the Borrowers, enforceable in accordance with their terms.

(b)       The execution, delivery and performance by the Borrowers of this Amendment and the Replacement Notes have been duly authorized by all necessary corporate action and do not (i) require any authorization, consent or approval by any governmental department, commission, board, bureau, agency or instrumentality, domestic or foreign, (ii) violate any provision of any law, rule or regulation or of any order, writ, injunction or decree presently in effect, having applicability to the Borrowers, or the articles of incorporation or by-laws of the Borrowers, or (iii) result in a breach of or constitute a default under any indenture or loan or credit agreement or any other agreement, lease or instrument to which any Borrower is a party or by which it or its properties may be bound or affected.

(c)       All of the representations and warranties contained in Article V of the Credit Agreement are correct on and as of the date hereof as though made on and as of such date, except to the extent that such representations and warranties relate solely to an earlier date.

13. No Other Waiver. Except as specifically set forth in paragraph 10, the execution of this Amendment and acceptance of the Replacement Notes and any documents related hereto shall not be deemed to be a waiver of any Default or Event of Default under the Credit Agreement or breach, default or event of default under any Security Document or other

-7-

document held by the Lender, whether or not known to the Lender and whether or not existing on the date of this Amendment.

14. Release. The Borrowers hereby absolutely and unconditionally release and forever discharge the Lender, and any and all participants, parent corporations, subsidiary corporations, affiliated corporations, insurers, indemnitors, successors and assigns thereof, together with all of the present and former directors, officers, agents and employees of any of the foregoing, from any and all claims, demands or causes of action of any kind, nature or description, whether arising in law or equity or upon contract or tort or under any state or federal law or otherwise, which any Borrower has had, now has or has made claim to have against any such person for or by reason of any act, omission, matter, cause or thing whatsoever arising from the beginning of time to and including the date of this Amendment, whether such claims, demands and causes of action are matured or unmatured or known or unknown.

15. Costs and Expenses. The Borrowers hereby reaffirm their agreement under the Credit Agreement to pay or reimburse the Lender on demand for all costs and expenses incurred by the Lender in connection with the Loan Documents, including without limitation all reasonable fees and disbursements of legal counsel. Without limiting the generality of the foregoing, the Borrowers specifically agree to pay all fees and disbursements of counsel to the Lender for the services performed by such counsel in connection with the preparation of this Amendment and the documents and instruments incidental hereto. The Borrowers hereby agree that the Lender may, at any time or from time to time in its sole discretion and without further authorization by the Borrowers, make a loan to the Borrowers under the Credit Agreement, or apply the proceeds of any loan, for the purpose of paying any such fees, disbursements, costs and expenses.

16. Miscellaneous. This Amendment may be executed in any number of counterparts, each of which when so executed and delivered shall be deemed an original and all of which counterparts, taken together, shall constitute one and the same instrument.

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date first written above.

HESKA CORPORATION By /s/ Jason Napolitano Its Chief Financial Officer	DIAMOND ANIMAL HEALTH, INC. By /s/ Jason Napolitano Its Chief Financial Officer
WELLS FARGO BANK, NATIONAL ASSOCIATION By [***] [***], Vice President

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Exhibit A to First Amendment

Compliance Certificate

To:         ______________________

Wells Fargo Business Credit

Date:      __________________, 2008

Subject:  Heska Corporation

 Financial Statements

In accordance with our Third Amended and Restated Credit and Security Agreement dated as of December 30, 2005 (the "Credit Agreement"), attached are the financial statements of Heska Corporation ("Heska") as of and for ________________, 20___ (the "Reporting Date") and the year-to-date period then ended (the "Current Financials"). All terms used in this certificate have the meanings given in the Credit Agreement.

I certify that, to the best of my knowledge, the Current Financials have been prepared in accordance with GAAP, subject to year-end audit adjustments, and fairly present the Borrowers' financial condition and the results of its operations as of the date thereof.

Events of Default. (Check one):

o The undersigned does not have knowledge of the occurrence of a Default or Event of Default under the Credit Agreement.

o The undersigned has knowledge of the occurrence of a Default or Event of Default under the Credit Agreement and attached hereto is a statement of the facts with respect to thereto.

I hereby certify to the Lender as follows:

o The Reporting Date does not mark the end of one of the Borrowers' fiscal quarters, hence I am completing all paragraphs below except paragraph 4.

o The Reporting Date marks the end of one of the Borrowers' fiscal quarters, hence I am completing all paragraphs below.

Financial Covenants. I further hereby certify as follows:

1.         Accounts Payable. Pursuant to Section 6.5 of the Credit Agreement, as of the Reporting Date, Past Due Payables on a consolidated basis was $_________________, which o satisfies o does not satisfy the requirement that the Borrowers have no Past Due Payables.

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

2.         Spread. Pursuant to Section 2.7 of the Credit Agreement, as of the Reporting Date, Heska's prior-fiscal-year Net Income was, on a consolidated basis, $_________________, which determines a base Spread of ______% pursuant to the table below (amounts in parentheses denote negative numbers).

Prior Fiscal Year Net Income	Spread
Less than $0	2.00%
Greater than or equal to $0 but less than $2,500,000	1.00%
Greater than or equal to $2,500,000 but less than $5,000,000	0.00%
Greater than or equal to $5,000,000	(0.05%)

            3.         Minimum Capital. Pursuant to Section 6.12 of the Credit Agreement, as of the Reporting Date, Heska's Capital was, on a consolidated basis, $_________________, which o satisfies o does not satisfy the requirement that such amount be not less than $_____________ on the Reporting Date, as set forth in the table below and adjusted, if applicable, in accordance with Section 6.12:

Date	Minimum Capital
July 31, 2008	[***]
August 31, 2008	[***]
September 30, 2008	[***]
October 31, 2008	[***]
November 30, 2008	[***]
December 31, 2008	[***]

                        4.         Minimum Net Income. Pursuant to Section 6.13 of the Credit Agreement, as of the Reporting Date, Heska's Net Income was, on a consolidated basis, $_________________, which o satisfies o does not satisfy the requirement that such amount be no less than $______________ on the Reporting Date, as set forth in the table below:

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Period	Minimum Net Income
Three months ending March 31 of each fiscal year	[***]
Six months ending June 30 of each fiscal year	[***]
Nine months ending September 30 of each fiscal year	[***]
Twelve months ending December 31 of each fiscal year	[***]

5.         Minimum Liquidity. Pursuant to Section 6.14 of the Credit Agreement, as of the Reporting Date, Heska's Liquidity was, on a consolidated basis, $_________________, which o satisfies o does not satisfy the requirement that such amount be no less than $1,500,000 on the Reporting Date.

6.         Minimum Individual Book Net Worth. Pursuant to Section 6.15 of the Credit Agreement, as of the Reporting Date, Heska's Book Net Worth was $_________________ and Diamond's Book Net Worth was $_________________, which o satisfies o does not satisfy the requirement that such amounts be no less than zero on the Reporting Date.

7.         Maximum Contributions. Pursuant to Section 7.4(a)(v) of the Credit Agreement, as of the Reporting Date, Heska's fiscal year-to-date aggregate contributions to non-Borrower Subsidiaries was $_________________, which o satisfies o does not satisfy the requirement that such amounts be no more than $700,000 during any fiscal year.

8.         Capital Expenditures. Pursuant to Section 7.10 of the Credit Agreement, for the fiscal year-to-date period ending on the Reporting Date, Heska's Capital Expenditures were, in the aggregate and on a consolidated basis, $_______________ which o satisfies o does not satisfy the requirement that such amount be not more than $_______________ during the period ending on the Reporting Date, as set forth in the table below and adjusted, if applicable, in accordance with Section 7.10:

-12-

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Period	Maximum Capital Expenditures
July 31, 2008	[***]
August 31, 2008	[***]
September 30, 2008	[***]
October 31, 2008	[***]
November 30, 2008	[***]
December 31, 2008	[***]

Attached hereto are all relevant facts in reasonable detail to evidence the computations of the financial covenants referred to above. These computations were made in accordance with GAAP.

HESKA CORPORATION

By _____________________________________

    Its _____________________________________

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Exhibit B to First Amendment

Compliance Certificate

To:         ______________________

Wells Fargo Business Credit

Date:      __________________, 2008

Subject:  Heska Corporation

 Financial Statements

In accordance with our Third Amended and Restated Credit and Security Agreement dated as of December 30, 2005 (the "Credit Agreement"), attached are the financial statements of Heska Corporation ("Heska") as of and for ________________, 20___ (the "Reporting Date") and the year-to-date period then ended (the "Current Financials"). All terms used in this certificate have the meanings given in the Credit Agreement.

I certify that, to the best of my knowledge, the Current Financials have been prepared in accordance with GAAP, subject to year-end audit adjustments, and fairly present the Borrowers' financial condition and the results of its operations as of the date thereof.

Events of Default. (Check one):

o The undersigned does not have knowledge of the occurrence of a Default or Event of Default under the Credit Agreement.

o The undersigned has knowledge of the occurrence of a Default or Event of Default under the Credit Agreement and attached hereto is a statement of the facts with respect to thereto.

I hereby certify to the Lender as follows:

o The Reporting Date does not mark the end of one of the Borrowers' fiscal quarters, hence I am completing all paragraphs below except paragraph 4.

o The Reporting Date marks the end of one of the Borrowers' fiscal quarters, hence I am completing all paragraphs below.

Financial Covenants. I further hereby certify as follows:

1.         Accounts Payable. Pursuant to Section 6.5 of the Credit Agreement, as of the Reporting Date, Past Due Payables on a consolidated basis was $_________________, which o satisfies o does not satisfy the requirement that the Borrowers have no Past Due Payables.

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

2.         Spread. Pursuant to Section 2.7 of the Credit Agreement, as of the Reporting Date, Heska's prior-fiscal-year Net Income was, on a consolidated basis, $_________________, which determines a base Spread of ______% pursuant to the table below (amounts in parentheses denote negative numbers).

Prior Fiscal Year Net Income	Spread
Less than $0	2.00%
Greater than or equal to $0 but less than $2,500,000	1.00%
Greater than or equal to $2,500,000 but less than $5,000,000	0.00%
Greater than or equal to $5,000,000	(0.05%)

            3.         Minimum Capital. Pursuant to Section 6.12 of the Credit Agreement, as of the Reporting Date, Heska's Capital was, on a consolidated basis, $_________________, which o satisfies o does not satisfy the requirement that such amount be $________________ on the Reporting Date, an amount not less than the Prior Year Capital Base plus the minimum capital factor set forth opposite such date, and adjusted, if applicable, in accordance with Section 6.12 (amounts in parentheses denote negative numbers):

Date	Minimum Capital Factor
January 31	[***]
February 28	[***]
March 31	[***]
April 30	[***]
May 31	[***]
June 30	[***]
July 31	[***]
August 31	[***]
September 30	[***]
October 31	[***]
November 30	[***]
December 31	[***]

            4.         Minimum Net Income. Pursuant to Section 6.13 of the Credit Agreement, as of the Reporting Date, Heska's Net Income was, on a consolidated basis,

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[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

$_________________, which o satisfies o does not satisfy the requirement that such amount be no less than $______________ on the Reporting Date, as set forth in the table below:

Period	Minimum Net Income
Three months ending March 31 of each fiscal year	[***]
Six months ending June 30 of each fiscal year	[***]
Nine months ending September 30 of each fiscal year	[***]
Twelve months ending December 31 of each fiscal year	[***]

            5.         Minimum Liquidity. Pursuant to Section 6.14 of the Credit Agreement, as of the Reporting Date, Heska's Liquidity was, on a consolidated basis, $_________________, which o satisfies o does not satisfy the requirement that such amount be no less than $1,500,000 on the Reporting Date.

6.         Minimum Individual Book Net Worth. Pursuant to Section 6.15 of the Credit Agreement, as of the Reporting Date, Heska's Book Net Worth was $_________________ and Diamond's Book Net Worth was $_________________, which o satisfies o does not satisfy the requirement that such amounts be no less than zero on the Reporting Date.

7.         Maximum Contributions. Pursuant to Section 7.4(a)(v) of the Credit Agreement, as of the Reporting Date, Heska's fiscal year-to-date aggregate contributions to non-Borrower Subsidiaries was $_________________, which o satisfies o does not satisfy the requirement that such amounts be no more than $700,000 during any fiscal year.

8.         Capital Expenditures. Pursuant to Section 7.10 of the Credit Agreement, for the fiscal year-to-date period ending on the Reporting Date, Heska's Capital Expenditures were, in the aggregate and on a consolidated basis, $_______________ which o satisfies o does not satisfy the requirement that such amount be not more than $_______________ during the period ending on the Reporting Date, as set forth in the table below and adjusted, if applicable, in accordance with Section 7.10:

-16-

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Period	Maximum Capital Expenditures
January 31	[***]
February 28	[***]
March 31	[***]
April 30	[***]
May 31	[***]
June 30	[***]
July 31	[***]
August 31	[***]
September 30	[***]
October 31	[***]
November 30	[***]
December 31	[***]

Attached hereto are all relevant facts in reasonable detail to evidence the computations of the financial covenants referred to above. These computations were made in accordance with GAAP.

HESKA CORPORATION

By _____________________________________

    Its _____________________________________

-17-

FIFTH AMENDMENT TO THIRD AMENDED AND RESTATED

CREDIT AND SECURITY AGREEMENT

This Amendment (the "Amendment"), dated as of October 16, 2008, is made by and between Heska Corporation, a Delaware corporation ("Heska"), Diamond Animal Health, Inc., an Iowa corporation ("Diamond") (each of Heska and Diamond may be referred to herein individually as a "Borrower" and collectively as the "Borrowers"), and Wells Fargo Bank, National Association, operating through its Wells Fargo Business Credit operating division (the "Lender").

RECITALS

A.        The Borrowers and the Lender are parties to a Third Amended and Restated Credit and Security Agreement dated as of December 30, 2005, (as amended to date and as the same may be hereafter amended from time to time, the "Credit Agreement").

B.        The Borrowers wish to use or continue to use of the following treasury management service or services (each a "Service", and if more than one, the "Services") offered by the Lender:

Loan Manager Service

Lockbox and Collection Account Service

C.        Each Service will now be offered to the Borrowers pursuant to a service description applicable to that Service (a "Service Description") that will supplement the Master Agreement, and if the Borrowers are currently using a Service, a new Service Description will replace the existing agreement or other document currently in effect between the parties governing such Service, which agreement or other document will be mutually terminated by the parties pursuant to the terms of this Amendment.

D.        The Borrowers and the Lender also wish to amend the Credit Agreement to eliminate references to the Lockbox Agreement and the Collateral Account Agreementpreviously in effect between them, and to make certain conforming changes to the Credit Agreement to accommodate the Service or Services being extended to the Borrowers referenced above.

NOW, THEREFORE, in consideration of the premises and for other good and valuable consideration, the parties agree as follows:

1.         Services and Service Descriptions. The Lender will extend to the Borrowers the following Service or Services, each of which will supplement and is incorporated as the agreement of the parties under the terms of Master Agreement:

The Loan Manager Service Description

The Lockbox and Collection Account Service Description

-18-

2.         Lockbox and Collection Account Service.The Lockbox and Collection Account Service Description attached to this Amendment that supplements the Master Agreement will terminate and replace in its entirety the Lockbox Agreement and the Collateral Account Agreement previously in effect between the parties. The Credit Agreement is amended to provide that each reference in it to the Lockbox Agreement and the Collateral Account Agreement shall be deemed to refer to the Lockbox and Collection Account Service Description to the Master Agreement, and that each reference to the "Collateral Account" shall mean the "Collection Account" as defined in the Lockbox and Collection Account Service Description. Any discrepancies that may exist between the terms of the Credit Agreement and the terms of the Master Agreement as supplemented by the Lockbox and Collection Account Service Description shall be resolved in favor of the Master Agreement as supplemented.

3.         Loan Manager Service. The Credit Agreement shall be amended to provide that Advances made through the Wells Fargo Loan Manager Service will be initiated by the Lender and credited to the Account, as that term is defined in the Loan Manager Service Description, as a Revolving Advance as of the end of each Business Day in an amount equal to the Loan Manager Advance Amount as defined in the Loan Manager Service Description, subject to the limitation that any Advance shall not exceed the amount, if any, by which the Borrowing Base exceeds the principal balance of the Revolving Note and the L/C Amount. The Credit Agreement shall be further amended to provide that the Lender shall have no obligation to make an Advance through Loan Manager at any time, and may terminate the Loan Manager Service in its discretion at any time. If the Lender terminates Loan Manager, then the Borrowers may continue to request Advances in accordance with the other provisions of the Credit Agreement.

4.        References. All references in the Credit Agreement to "this Agreement" shall be deemed to refer to the Credit Agreement as amended by this Amendment, and any and all references in the Security Documents to the Credit Agreement shall be deemed to refer to the Credit Agreement as amended by this Amendment. The defined term "Security Documents" shall be amended to include any Service Description to the Master Agreement that relates to either the Lockbox and Collection Account Service or to the Collection Account Service, whichever may be applicable.

5.         No Other Changes. Except as explicitly amended by the terms of this Amendment, all of the terms and conditions of the Credit Agreement shall otherwise remain in full force and effect.

6.         Representations and Warranties; Acknowledgement of Receipt. Each Borrower hereby represents and warrants to the Lender that such Borrower has all requisite power and authority to execute this Amendment, and to perform all of its obligations hereunder, and this Amendmenthas been duly executed and that this Amendment has been delivered such Borrower and constitutes the legal, valid and binding obligation of the Borrower, enforceable in accordance with its terms. The Borrowers also acknowledge receipt of the above referenced Service Descriptions.

 

-19-

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

7.         Execution in Counterparts; Delivery of Counterparts. This Amendment may be authenticated by the parties in any number of counterparts, each of which will be deemed an original, and all such counterparts, taken together, shall constitute one and the same instrument. Delivery by fax or by encrypted e-mail or e-mail file attachment of any counterpart to this Amendment that has been authenticated by an authorized signature will be deemed to be an authenticated original. The Borrowers shall send the original authenticated counterpart to the Lender by first class U.S. mail or by overnight courier, but the Borrowers' failure to deliver the original of this Amendment shall not affect its validity, enforceability, and binding effect.

            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date first above written.

HESKA CORPORATION By /s/ Jason Napolitano Its Chief Financial Officer	DIAMOND ANIMAL HEALTH, INC. By /s/ Jason Napolitano Its Chief Financial Officer
WELLS FARGO BANK, NATIONAL ASSOCIATION By   [***]       [***], Vice President

 

-20-

EX-10

Exhibit 10.2

[***] – Certain information in this exhibit have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

July 12, 2005

Boule Medical AB

P.O. Box 42056

SE-126 13 Stockholm, Sweden

Attn: Ernst Westman, President

Re: Supply and Distribution Agreement between Heska Corporation and Boule Medical AB dated as of June 17, 2003, as amended by letters dated June 1, 2004 and December 31, 2004 (collectively, the “Distribution Agreement”)

Dear Mr. Westman:

This letter will confirm our agreement regarding the notice of termination and other matters relating to the Distribution Agreement set forth in your letter of May 24, 2005 (the “Termination Notice”).

Boule and Heska hereby agree to amend the Distribution Agreement as set forth below; provided, that Heska has met the Payment Conditions (defined below) on or before August 3, 2005 (the “Payment Deadline”):

1.          Payment Conditions. The agreements set forth in this letter are subject to the conditions precedent that on or before the Payment Deadline Heska shall have paid USD 842,548.44 and EUR 412,593.32 to Boule, by wire transfer or other immediately available funds (the “Payment Conditions”).

2.          Rescission of Termination Notice. Effective upon satisfaction of the Payment Conditions, the Termination Notice is hereby rescinded by Boule and the Distribution Agreement, as amended hereby, shall continue in full force and effect in accordance with its terms, without regard to any of the matters set forth in the Termination Notice.

3.          Purchase Minimums. Heska’s minimum purchase commitment under the Distribution Agreement for Calendar Year 2005 shall be [***] Analyzers. Boule and Heska acknowledge and agree that Heska’s current non-binding forecast for Calendar Year 2005 is [***] Analyzers and that [***] Analyzers have been received by Heska thus far during Calendar Year 2005.

4.          Past Claims. Effective upon satisfaction of the Payment Conditions, each of Boule and Heska hereby waives and releases any and all claims and rights to relief of any kind for any late payment, breach, default or non-performance by the other party under the Distribution Agreement on or before the date the Payment Conditions are satisfied, including but not limited to the interest charges and other claims that Boule set forth in the Termination Notice and any claims by Heska for lost sales or other consequential damages.

1

5.          Effect of Letter. This letter will constitute a written agreement amending the Distribution Agreement as contemplated by Section 9.10 thereof. If there is a conflict between the terms of this letter and the Distribution Agreement, this letter shall control.

Very truly yours

HESKA CORPORATION

By: /s/ Jason Napolitano

Its: Chief Financial Officer

ACCEPTED AND AGREED:

BOULE MEDICAL AB

By: /s/ Ernst Westman

Its: President

2

Stockholm 2007-03-20

Heska Corporation

1613 Prospect Parkway

Fort Collins, Colorado 80525

Attention: Robert Grieve, President

Re: Supply and Distribution Agreement (“Distribution Agreement”) by and between Heska Corporation (“Heska”) and Boule Medical AB (“Boule”) dated June 17, 2003

Dear Mr. Grieve:

This letter confirms our agreement that Boule will continue with our Distribution Agreement even though Heska fell short of its 2006 purchase minimums (the “2006 Shortfall”) and that such 2006 Shortfall neither constitutes a default by Heska nor gives rise to any additional consideration, remedies or penalties in favor of Boule. This letter also establishes that minimums set for 2007 are valid and part of the Distribution Agreement going forward and that this waiver relates solely to the outcome of 2006.

This letter will constitute a written agreement amending the Distribution Agreement as contemplated by Section 9.10 thereof. If there is a conflict between the terms of this letter and the Distribution Agreement, this letter shall control. Except as modified by this letter, the Distribution Agreement remains in full force and effect in accordance with its terms.

Very truly yours,

BOULE MEDICAL AB

By: /s/ Ernst Westman

Its: CEO

ACCEPTED AND AGREED:

HESKA CORPORATION

By: /s/ John Flanders

Its: VP, General Counsel

3

Sent via Federal Express

January 23, 2008

Ernst Westman

President

Boule Diagnostics International AB

P.O. Box 42056

Västberga Allé 32

SE-126 13 Stockholm

Sweden

Re: Supply and Distribution Agreement (“Agreement”) between Heska Corporation and Boule Medical AB dated June 17, 2003 as amended

Dear Mr. Westman:

This letter confirms our agreement that Boule will continue with our Distribution Agreement even though Heska fell short of its 2007 purchase minimums (the “2007 Shortfall”) and that such 2007 Shortfall neither constitutes a default by Heska nor gives rise to any additional consideration, remedies or penalties in favor of Boule. This letter also establishes that minimums set for 2008 are valid and part of the Distribution Agreement going forward and that this waiver relates solely to the outcome of 2007.

This letter will constitute a written agreement amending the Distribution Agreement as contemplated by Section 9.10 thereof. If there is a conflict between the terms of this letter and the Distribution Agreement, this letter shall control. Except as modified by this letter, the Distribution Agreement remains in full force and effect in accordance with its terms.

Sincerely,

Heska Corporation

By: /s/ Jason Napolitano

Its: Chief Financial Officer

ACCEPTED AND AGREED

Boule Medical AB

By: /s/ Ernst Westman

Its: CEO

4

AMENDMENT TO

SUPPLY AND DISTRIBUTION AGREEMENT

This Amendment,effective as of October 1, 2008, modifies the Supply and Distribution Agreement between Heska Corporation and Boule Medical AB, dated June 17, 2003, hereinafter referred to as “Amendment No. 6”, as modified by Amendment Letter dated June 1, 2004 (hereinafter referred to as “Amendment No. 1”), Amendment Letter dated December 31, 2004 (hereinafter referred to as “Amendment No. 2”), Amendment Letter dated July 12, 2005 (hereinafter referred to as “Amendment No. 3”), Amendment Letter dated March 20, 2007 (hereinafter referred to as “Amendment No. 4”) and Amendment Letter dated January 23, 2008 (hereinafter referred to as “Amendment No. 5”), collectively referred to as the “Original Agreement”.

1. Section 1.2. Section 1.2 “Analyzer”, of the Original Agreement is hereby deleted in its entirety and replaced with the following:

1.2 “Analyzer” means the Ca 620-16 Veterinary Hematology Analyzer (CBC-DIFF™ Veterinary Hematology System) or BM800 Veterinary Hematology Analyzer (HemaTrue™ Veterinary Hematology Analyzer) manufactured by Boule.

2. Section 1.8. Section 1.8 “Product”, of the Original Agreement is hereby deleted in its entirety and replaced with the following:

1.8 “Product” means the Analyzer and associated spare parts, consumables and reagents listed in Appendix A.

3. Section 2.5. The date “November 30, 2003” is hereby deleted and replaced with “January 1, 2009” in both the first and second sentences of Section 2.5 of the Original Agreement.

4. Appendix A2. Appendix A2 of the Original Agreement is hereby deleted in its entirety and replaced with Appendix A2 attached hereto.

5. Appendix A3. Appendix A3 of the Original Agreement is hereby deleted in its entirety and replaced with Appendix A3 attached hereto.

6. Appendix A4. Appendix A4 of the Original Agreement is hereby deleted in its entirety and replaced with Appendix A4 attached hereto.

5

7. Appendix A5. Appendix A5 of the Original Agreement is hereby deleted in its entirety and replaced with Appendix A5 attached hereto.

8. Appendix B. Appendix B of the Original Agreement is hereby deleted in its entirety and replaced with Appendix B attached hereto.

9. No Other Changes. Except as expressly modified by this Amendment No. 6, all other provisions of the Original Agreement shall remain in full force and effect.

IN WITNESS WHEREOF, the parties have executed this Amendment by their duly authorized representatives.

SIGNED:

Heska Corporation Boule Medical AB

By: /s/ Jason Napolitano By: /s/ Ernst Westman

Name: Jason Napolitano Name: Ernst Westman

Title: Chief Financial Officer Title: Chief Executive Officer

Date: October 9, 2008 Date: October 9, 2008

6

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Appendix A2

This Appendix forms an integrated part of the Supply and Distributorship Agreement between BOULE and HESKA.

Heska agrees to make orders of the following Products in units divisible by two. Payment for fifty percent (50%) of the units in each shipment shall be made in Euros and fifty percent (50%) in U.S. dollars. The initial Euro prices are set forth below, subject to adjustment for actual changes in material and labor costs pursuant to the last paragraph of Section 4.1 of the Supply and Distribution Agreement. The dollar prices shall be an amount equal to the then-current Euro price, multiplied by 1.18.

Art no	Description	Price Net Euro
INSTRUMENTS (CA 620-16 Vet related)
260	Micro capillary adapter compl.	[***]
1090769	Printer paper, 5 pcs	[***]

7

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Appendix A3

This Appendix forms an integrated part of the Supply and Distributorship Agreement between BOULE and HESKA.

Payment for one hundred percent (100%) of the units of the Products listed below shall be made in U.S. dollars. The initial U.S. dollar price for each of such Products shall be the price set forth below, subject to adjustment for actual changes in raw material and labor costs pursuant to the last paragraph of Section 4.1 of the Supply and Distribution Agreement.

Art no	Description	Price Net
REAGENTS
1503976	CBC-DiffTon™ Diluent Solution (10L)	[***]
1503978	CBC-DiffLyse™ Lysing Solution (5L)	[***]
1504112	Enzymatic Cleaner (100ml)	[***]
5941	Hematology System Cleaning Kit	[***]
1504180	HemaTrue™ Diluent Solution (1.9L)	[***]
1504181	HemaTrue™ Lysing Solution (1.9L)	[***]
1504182	HemaTrue™ Enzymatic Cleaner (1.9L)	[***]
CONTROLS & CALIBRATORS
Boule – 8 VET CON
1504026	1 x 4.5 ml normal	[***]
1504080	6 x 4.5 ml normal	[***]
1504151	Boule VetCon N 8p 6x4.5ml	[***]
N/A	18 x 4.5 ml normal	[***]
Boule – VET CAL
1504028	1 x 3.0 ml	[***]

8

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Appendix A4

This Appendix forms an integrated part of the Supply and Distributorship Agreement between BOULE and HESKA.

Payment for one hundred percent (100%) of the units of the Products listed below shall be made in Euros. The initial Euro price for each of such Products shall be the price set forth below, subject to adjustment for actual changes in raw material and labor costs pursuant to the last paragraph of Section 4.1 of the Supply and Distribution Agreement.

Boule P/N Description Price Net

1010464 Instrument cover, Heska [***] eur

1010849 Display Grounding Bar Short [***] eur

1010851 Display Grounding Bar Long [***] eur

1010921_S Start plate VET [***] eur

1020144 Lid to Cubitainer [***] eur

1021136_S Tube holder, Heska [***] eur

1030122 Flat display cable, shielded [***] eur

1030127_S Power cord Main board [***] eur

1030128_S Cable blood detector [***] eur

1030129_S BB cable, Mixingchamber cable [***] eur

1030140_S Cable Coax WBC [***] eur

1030142_S Cable, photometer [***] eur

1030143_S Ground cable [***] eur

1030146 Valve cable 5 assy [***] eur

1040017_S Contact plate cover ground x10 [***] eur

1040079 Extension spring [***] eur

1050159 Keyboard folio CBC [***] eur

1060046 Rubber washer [***] eur

1080030 Transport Fuse, Tubing [***] eur

1080048 Door, CBCDiff [***] eur

1080055 Tube holder [***] eur

1080058_S Pinch valve head x10 [***] eur

1090719_S Switch cable MCI [***] eur

1090787_S Cable, Start Micro switch [***] eur

1090796_S Switch [***] eur

1090836 Start plate 1 [***] eur

1090842 Motor assy connected Heska [***] eur

1090910_S Tube valve complete [***] eur

1090916_S Membrane pump [***] eur

9

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

1090919_S Level detector complete [***] eur

1090921_S WBC measuring chamber complete [***] eur

1090922_S Cap. Holder complete RBC [***] eur

1090927_S Shear valve complete [***] eur

1090928_S Display complete [***] eur

1090929_S Display incl. touch BM800 [***] eur

1090933_S Asp. washing cup complete [***] eur

1090941_S Drain cup [***] eur

1090945_S RBC measuring chamber complete [***] eur

1091002 Barcode reader, Medonic [***] eur

1091043_S RBC pipette incl. tubes [***] eur

1091044_S WBC metering unit incl. tubes [***] eur

1091050_S RBC metering unit incl. tubes [***] eur

1091061_S WBC pipette incl. tubes [***] eur

1091091_S Mixer motor [***] eur

1091149 Clog Filter Device [***] eur

1091152_S Aspiration whole blood [***] eur

1091159 Level Detector Lyse Vet [***] eur

1091160 Level Detector Diluent Vet [***] eur

1091161_S Liquid filter kpl. [***] eur

1091165_S Capillary holder WBC [***] eur

1091220 Front assy. BM800 Heska [***] eur

1091227_S MPA handle assy [***] eur

1091232_S MPA assy [***] eur

1091234_S CPU board, assy [***] eur

1091244_S Valve board BM800 tested [***] eur

1091249 Bottle tray assy [***] eur

1091250_S Level detector yellow assy [***] eur

1091251_S Level detector red assy [***] eur

1091252_S Level detector blue assy [***] eur

1091268_S DC air pump assy. [***] eur

1110047 Lifting strap [***] eur

1120074_S Display board BM800 [***] eur

1120078_S Switched Powerboard [***] eur

1140103 Cylindr.isol. C15/15 M4x4 55 [***] eur

1140111 Locking washer [***] eur

1140165 Locking washer black CCLR2 [***] eur

1140258 Tube PVC 3,0 x 1,5 [***] eur

1140614 Port, Reagent Level Sensor,Red [***] eur

1140615 Port, Reagent lvl sensor, Ylow [***] eur

1140641 Clips for door [***] eur

10

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

1140643_S Transformer BM800 [***] eur

1140703_S Cable for CAN COM. 0,5m BM800 [***] eur

1150495_S KNF Liquid Pump [***] eur

1150521 Repairkit Waste pump KNF [***] eur

1200064 Back Flush Syringe Kit [***] eur

1301077 MPA accessories kit [***] eur

2604013 Case long, complete [***] eur

2604014 Case short, complete [***] eur

2606002 Handle complete [***] eur

4804014 Ind. lower [***] eur

5303042 Cover plate filter board [***] eur

5304002 Indicator housing [***] eur

5304008 Rolled threadball screw [***] eur

5304011 Guiding rod [***] eur

5304015 Guiding wheel [***] eur

5304026 Measuring tube [***] eur

5304048 Rear valve [***] eur

5304075 Housing upper glass cyl. [***] eur

5304077 Glass Cylinder [***] eur

5304085 Lacquer notation [***] eur

5304097 Detector [***] eur

5304116 Rear valve part US [***] eur

5304167 Tube, ground connector [***] eur

5304174 Gearbox machining [***] eur

5306002 Capillary Tube Holder, Complete [***] eur

5306003 Counting cup RBC compete [***] eur

5306004 Counting cup WBC compete [***] eur

5306006 Gearbox complete [***] eur

5306007 Asp. Pipette Whole Blood [***] eur

5306008 Sealing rod complete [***] eur

5306009 Sealing piston complete [***] eur

5306026_S Mixing cup complete [***] eur

5306078 MPA mounted [***] eur

5306081 Motor assy connected [***] eur

5306103 Waste pump 60Hz mounted [***] eur

5308002 Detector cable mix cup CBC [***] eur

5308004 Cable blood detector [***] eur

5308005 Cable Assy servo potm. [***] eur

5308008 Photocell, HGB, complete [***] eur

5308009_S Cable, coax, RBC, L=420 [***] eur

5308011 Cable Assy Start/Stop [***] eur

11

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

5308013 Cable Assay HGB lamp [***] eur

5308014 Cable Assy optoswitch/syring [***] eur

5309001 PCB CPU 530 complete tested [***] eur

5309011 PCB power mounted tested [***] eur

5309021 PCB amplifier mounted & tested [***] eur

5814036 Mixing cup [***] eur

5814064 Asp. pip. predil. blood / upps [***] eur

5814142 Valve part f. [***] eur

5814143 Valve house [***] eur

6209001 PCB display mounted tested [***] eur

9970119 Tubing FEP 0.7 x 1.5 [***] eur

9980001 Repair kit for waste pump [***] eur

9990455 Washer 0734 nylon svart [***] eur

9990598 Filter VG9 4mm Ø 8 [***] eur

9990970 Pin CP 4*25 A1m6 [***] eur

9990973 Gearbox type F, 4 1/6 [***] eur

9991148 Rod Sealing Guidence Cap [***] eur

9991161 Plastic cover PVC print Medoni [***] eur

9991197 Plastic cover PVC 350*430* [***] eur

9991619 Bi pin lamp with tech.addendum [***] eur

N/A Vet Mixing rotor 3 ml (HemaTrue) [***] eur

12

[***] – Certain information on this page have been omitted and filed separately with the Securities and Exchange Commission. Confidential treatment has been requested with respect to the omitted portions.

Appendix A5

This Appendix forms an integrated part of the Supply and Distributorship Agreement between BOULE and HESKA.

Heska agrees to make orders of the following Products in units divisible by two. Payment for fifty percent (50%) of the units in each shipment shall be made in Euros and fifty percent (50%) in U.S. dollars. The Euro price shall be as listed below, subject to adjustment for actual changes in material and labor costs pursuant to the last paragraph of Section 4.1 of the Supply and Distribution Agreement. The U.S. dollar prices shall be as listed below, subject to adjustment for actual changes in material and labor costs pursuant to the last paragraph of Section 4.1 of the Supply and Distribution Agreement.

Art no	Description	Price Net Euro	Price Net USD
INSTRUMENTS
1301074	CA 620-16 Vet System with MPA, 110/60	[***]	[***]
1400060	HemaTrue™ Veterinary Hematology Analyzer System with MPA	[***]	[***]

13

Appendix B

Product Specifications: CBC-DIFF™ Veterinary Hematology System

- Measuring Principle (RBC, WBC, PLT) Impedance

- Measuring Principle (HGB) Colormetric (540 nm) using cyanide free reagent

- Discriminators (i.e. thresholds) Floating programmable

- Sampling system Shear valve (maintenance free)

- Parameters reported: RBC, MCV, HCT, PLT, MPV, HGB, MCH, MCHC, WBC, RDW, LYMF abs, MID abs, GRAN abs, LYMF %, MID %, GRAN %

- Size distributions printed for RBC, PLT and WBC differential

- Aspirated blood volume (EDTA tubes) Approx 125 µl

- Blood volume using the

Micro Pipette Adapter 20 µl

- Screen LCD

- Keyboard Numerical

- Total cycle time Approx 73 seconds

- Sample display and print after Approx 53 seconds

- Printer* External, IBM or HP format

- Memory Approx. 250 samples

- QC capability SD, CV, X, n

- HGB correction on high WBC counts Yes

- Warning flags on parameter abnormalities Yes

- Floating discriminator RBC/PLT Yes (position printed)

- Mathematical 3-part. diff WBC calc. Yes

- Automatic HGB blank on each sample Yes

- Carry Over <1%

- Serial output** Yes

- Main power voltage / Fuses 230 V Fuse 5x20mm T2A

120 V Fuse 5x20mm T4A

- Power voltage tolerances ± 15%

- Power consumption (operational) Max 250 VA

- Power consumption (standby) Max 50 VA

- Built-in test/adjustment programs Yes

- Dimensions (inches) H=13.8 W=16.5 D=18.1

- Weight Approx. 56 lb

* Printer must comply with standard EN 60950 or DPU 414 supplied by Heska Corporation.

** Serial connection must conform to standard EN 60950.

14

Product Specifications: HemaTrue™ Veterinary Hematology Analyzer

Measuring principle RBC, WBC, PLT	Impedance
Measuring principle HGB	Photometer, Cyanide free method 535nm ±5nm
Programmable WBC Discriminator	Yes
Sampling system	Closed shear valve
Parameters reported	RBC, MCV, HCT, PLT, MPV, HGB, MCH, MCHC, WBC, RDW%, RDW abs, LYMPH abs, MONO abs, GRAN abs, LYMPH%, MONO%, GRAN%
Size distributions printed for	RBC, PLT and WBC diff
Aspirated blood volume (open tubes)	<125 µl
Blood volume using the Micropipette Adapter (MPA)	20 µl
LCD	Graphical color touch screen, 240 columns x 320 rows
Keyboard	Virtual incorporated keyboard (External keyboard possible)
Analysis time	<1 minute
QC capabilities	Mean, SD, CV, Levey-Jennings
HGB correction on high WBC counts	Yes
System information messages on parameter abnormalities	Yes
Floating discriminator RBC/PLT	Yes (position printed)
Automatic HGB blank on each sample	Yes
Carry over	RBC, HGB, WBC =‹1%, PLT =‹2%
Barcode reader input	Yes
Serial output	Yes (Conformed to standard EN 60950)
Power consumption (operational)	Max 100 VA
Power consumption (standby)	Max20 VA
Mains frequency	50-60 HZ
Mains voltage	100-240 VHZ
Effective mains current	Max. 2 A
Certified external mains power supply	AML1 50PS24 >2556 or FDF1 5O3-A-24-C14 (51441)
Built-in test/adjustment programs	Yes
Temperature	18-32° C (64-90° F)
Humidity (non-condensing)	Up to 80%
Dimensions	(HxWxD) 410x290x460mm (16.1 x 11.4 x 18.1 in)
Weight	=‹18 kg (Standard Version) (=‹40 Ib)

15

EX-31

Exhibit 31.1

CERTIFICATION

I, Robert B. Grieve, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Heska Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal controls over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; and

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: November 10, 2008 /s/ Robert B. Grieve

ROBERT B. GRIEVE

Chairman of the Board and Chief Executive Officer

(Principal Executive Officer)

EX-31

Exhibit 31.2

CERTIFICATION

I, Jason A. Napolitano, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Heska Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e))and internal controls over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; and

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: November 10, 2008 /s/ Jason A. Napolitano

JASON A. NAPOLITANO

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

EX-32

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Robert B. Grieve, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Heska Corporation on Form 10-Q for the quarterly period ended September 30, 2008 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Form 10-Q fairly presents in all material respects the financial condition and results of operations of Heska Corporation.

By:             /s/  Robert B. Grieve     
Name:       ROBERT B. GRIEVE
Title:         Chairman of the Board and
                  Chief Executive Officer

I, Jason A. Napolitano, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Heska Corporation on Form 10-Q for the quarterly period ended September 30, 2008 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Form 10-Q fairly presents in all material respects the financial condition and results of operations of Heska Corporation.

By:             /s/  Jason A. Napolitano     
Name:        JASON A. NAPOLITANO
Title:          Executive Vice President and
                   Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to Heska Corporation and will be retained by Heska Corporation and furnished to the Securities and Exchange Commission or its staff upon request.