Item 1.01 Entry into a Material Definitive Agreement

MWI Veterinary Supply, Inc. ("MWI") and Pfizer, Inc. ("Pfizer") have entered into the following agreements:

† 2009 Strategic Brands Distribution Agreement, effective January 1, 2009, which was executed and delivered by Pfizer to MWI on March 4, 2009,

† Companion Animal Select Brands Distribution Agreement, effective January 1, 2009, which was executed and delivered by Pfizer to MWI on March 4, 2009,

Under the 2009 Strategic Brands Distribution Agreement, MWI is entitled to distribute the Rimadyl, Clavamox and Simplicef products offered by Pfizer. Under the Agreement, MWI is entitled to receive certain service incentives and rebates. MWI is required to maintain sufficient staffing levels of sales representatives and store and handle inventory under appropriate conditions that will maintain the quality and integrity of the products. The agreement expires on December 31, 2010 and can be terminated by Pfizer with or without cause upon 30 days prior written notice, and either party can terminate the agreement immediately upon written notice for material breach of the contract.

Under the Companion Animal Select Brands Distribution Agreement, MWI is entitled to distribute the Zeniquin, Temaril-P, Antirobe, Doxirobe, Medrol, Dexdomitor and Antisedan products offered by Pfizer. Under the Agreement, MWI is entitled to receive a logistics fee and certain sales incentives. MWI is required to maintain sufficient staffing levels of sales representatives and store and handle inventory under appropriate conditions that will maintain the quality and integrity of the products. The agreement expires on December 31, 2010 and can be terminated by Pfizer with or without cause upon 30 days prior written notice, and either party can terminate the agreement immediately upon written notice for material breach of the contract.

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