MWI Veterinary Supply, Inc. Common Stock UNDERWRITING AGREEMENT dated July 19, 2006 Piper Jaffray & Co. Banc of America Securities LLC William Blair & Company, L.L.C.Underwriting Agreement • July 21st, 2006 • MWI Veterinary Supply, Inc. • Wholesale-medical, dental & hospital equipment & supplies • New York
agreement or other organizational documents to enter into the Underwriting Agreement and its Custody Agreement and Power of Attorney, to sell, transfer and deliver all of the Shares which may be sold by such Entity Selling Stockholder pursuant to the Underwriting Agreement and to comply with its other obligations thereunder. Each Individual Selling Stockholder has the legal right and power to enter into the Underwriting Agreement and his or her Custody Agreement and Power of Attorney to sell, transfer and deliver all of the Shares which may be sold by such Individual Selling Stockholder pursuant to the Underwriting Agreement and to comply with his or her other obligations thereunder.
