	UNITED STATES
	SECURITIES AND EXCHANGE COMMISSION
	Washington, D.C. 20549

SCHEDULE 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE 13d-2

(Amendment No. 2)*

MWI Veterinary Supply, Inc.

(Name of Issuer)

Common Stock, par value $.01 per share

(Title of Class of Securities)

55402X-10-5

(CUSIP Number)

December 31, 2009

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o	Rule 13d-1(b)
o	Rule 13d-1(c)
x	Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior coverage page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes)

CUSIP No. 55402X-10-5

	1.	Names of Reporting Persons Agri Beef Co.

	2.	Check the Appropriate Box if a Member of a Group
		(a)		o
		(b)		x

	3.	SEC Use Only

	4.	Citizenship or Place of Organization Idaho

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 716,529

			6.		Shared Voting Power 0

			7.		Sole Dispositive Power 716,529

			8.		Shared Dispositive Power 0

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 716,529

	10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares o

	11.	Percent of Class Represented by Amount in Row 9 5.9%

	12.	Type of Reporting Person CO

CUSIP No. 55402X-10-5

Item 1(a). Name of Issuer:
	MWI Veterinary Supply, Inc. (the “Company”)

Item 1(b). Address of Issuer’s Principal Executive Offices:
	651 S. Stratford Drive, Suite 100, Meridian, ID 83642

Item 2(a). Name of Person Filing:
	Agri Beef Co.

Item 2(b). Address of Principal Business Office or, if none, Residence:
	1555 Shoreline Drive, Third Floor, Boise, ID 83702

Item 2I. Citizenship:
	Idaho

Item 2(d). Title of Class of Securities:
	Common Stock, par value $.01 per share

Item 2(e) CUSIP Number:
	55402X-10-5

Item 3.	If this statement is filed pursuant to §§240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a: Not Applicable.
	(a)	o	Broker or dealer registered under Section 15 of the Exchange Act;
	(b)	o	Bank as defined in Section 3(a)(6) of the Exchange Act;
	(c)	o	Insurance company as defined in Section 3(a)(19) of the Exchange Act;
	(d)	o	Investment company registered under Section 8 of the Investment Company Act;
	(e)	o	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
	(f)	o	An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
	(g)	o	A parent holding company or control person in accordance with Rule 13d 1(b)(1)(ii)(G);
	(h)	o	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
	(i)	o	A church plan that is excluded from the definition of an investment company under Section 3I(14) of the Investment Company Act;
	(j)	o	Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

CUSIP No. 55402X-10-5

Item 4.	Ownership.
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
	(a)	Amount beneficially owned: 716,529
	(b)	Percent of class: 5.9%
	(c)	Number of shares as to which such person has:
		(i)	Sole power to vote or to direct the vote 716,529
		(ii)	Shared power to vote or to direct the vote 0
		(iii)	Sole power to dispose or to direct the disposition of 716,529
		(iv)	Shared power to dispose or to direct the disposition of 0

Item 5.	Ownership of Five Percent or Less of a Class.
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following o.

Item 6.	Ownership of More than Five Percent on Behalf of Another Person.
Not Applicable.

Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.
Not Applicable.

Item 8.	Identification and Classification of Members of the Group.
Not Applicable.

Item 9.	Notice of Dissolution of Group.
Not Applicable.

CUSIP No. 55402X-10-5

Item 10.	Certifications.
Not Applicable.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

		AGRI BEEF CO.


	By:	/s/ Robert N. Rebholtz, Jr.
		Name:	Robert N. Rebholtz, Jr.
		Title:	Chief Executive Officer
Dated: January 14, 2010

The original statement shall be signed by each person on whose behalf the statement is filed or his authorized representative. If the statement is signed on behalf of a person by his authorized representative other than an executive officer or general partner of the filing person, evidence of the representative’s authority to sign on behalf of such person shall be filed with the statement, provided, however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference. The name and any title of each person who signs the statement shall be typed or printed beneath his signature.

NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties for whom copies are to be sent.

	ATTENTION:
Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001)