Item 8.01. Other Events

Mary Patricia B. Thompson, Senior Vice President of Finance and Administration, Chief Financial Officer, James W. Culpepper, Vice President of Inventory Management, Jeffrey J. Danielson, Vice President of Sales, and John R. Ryan, Vice President of Marketing (collectively the "Executives") have entered into pre-arranged stock trading plans to sell a limited number of their shares of MWI Veterinary Supply, Inc. (the "Company") common stock for personal financial management purposes. These plans are designed to comply with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended, and the Company's insider trading policies regarding stock transactions (the "10b5-1 Plans"), and in accordance with Rule 10b5-1 may be amended or terminated at any time.

The 10b5-1 Plan entered into by Mr. Culpepper allows for the sale of a maximum of 18,000 shares of the Company's common stock through August 31, 2010. The 10b5-1 Plan entered into by Ms. Thompson allows for the sale of a maximum of 18,000 shares of the Company's common stock through September 30, 2010. The 10b5-1 Plan entered into by Mr. Danielson allows for the sale of a maximum of 24,000 shares of the Company's common stock through September 30, 2010. The 10b5-1 Plan entered into by Mr. Ryan allows for the sale of a maximum of 18,000 shares of the Company's common stock through October 31, 2010. The shares to be sold pursuant to these 10b5-1 Plans relate to stock options the Company granted to the Executives on June 18, 2002.

Transactions made under the 10b5-1 Plans will be disclosed publicly through Form 4 filings with the Securities and Exchange Commission.

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