X0202 4 2008-01-03 0 0001331931 Pet DRx CORP EHHA 0000808722 KNOTT DAVID M 485 UNDERHILL BLVD STE 205 SYOSSET NY 11791-3419 0 0 1 0 Common Stock 2008-01-03 4 P 0 181600 8.10 A 484600 I By Knott Partners, L.P. Common Stock 2008-01-03 4 P 0 124200 8.10 A 328700 I By Shoshone Partners, L.P. Common Stock 2008-01-03 4 P 0 3300 8.10 A 5800 I By Mulsanne Partners, L.P. Common Stock 2008-01-03 4 P 0 281300 8.10 A 699000 I By Knott Partners Offshore Master Fund , L.P. Common Stock 2008-01-03 4 P 0 59600 8.10 A 111700 I By Managed Accounts Warrants to purchase one share of Common Stock 6.00 2010-03-17 Common Stock 220400 220400 I By Knott Partners, L.P. Warrants to purchase one share of Common Stock 6.00 2010-03-17 Common Stock 110000 110000 I By Shoshone Partners, L.P. Warrants to purchase one share of Common Stock 6.00 2010-03-17 Common Stock 1000 1000 I By Mulsanne Partners, L.P. Warrants to purchase one share of Common Stock 6.00 2010-03-17 Common Stock 251900 251900 I By Knott Partners Offshore Master Fund, L.P. Warrants to purchase one share of Common Stock 6.00 2010-03-17 Common Stock 31700 31700 I By Managed Accounts The Reporting Person is the managing member of Knott Partners Management, LLC, which is (i) the sole general partner of Shoshone Partners, L.P. , Knott Partners Offshore Master Fund, L.P., and Mulsanne Partners, L.P. and (ii) the managing general partner of Knott Partners, L.P. This entry represents securities of the issuer held by institutional managed accounts for which Dorset Management Corporation provides investment management services (the "Managed Accounts"). As a result of the Reporting Person's interests in Knott Partners Management, LLC and in Dorset Management Corporation, the Reporting Person has investment discretion and control of the securities in this entry. The Reporting Person may be deemed to beneficially own an indirect pecuniary interest in securities in this entry as a result of a performance related fee. Except with respect to Knott Partners, L.P. , Knott Partners Offshore Master Fund, L.P., and Shoshone Partners, L.P., in which the Reporting Person owns a beneficial interest, the Reporting Person disclaims beneficial ownership therein except to the extent ultimately realized. Each of Knott Partners, L.P., Knott Partners Offshore Master Fund, L.P., Shoshone Partners, L.P., Mulsanne Partners, L.P. and the Managed Accounts disclaims beneficial ownership of securities reported as owned by any other party. The Warrants are exercisable upon completion of a business combination with a target business. The company has identified a target business to acquire and has scheduled a special meeting of its shareholders for 1/4/08, to vote on the proposed combination. The company and the proposed target have previously entered into a Second Amended and Restated Agreement and Plan of Merger, dated as of October 23, 2007. The company has proposed completion of the combination as soon as practicable following shareholder approval. /s/ David M. Knott 2008-01-07