MERIDIAN, ID -- (Marketwire) -- 07/23/09 -- MWI Veterinary Supply, Inc. (NASDAQ: MWIV) announced today that the Company will release financial results for its fiscal year 2009 third quarter ended June 30, 2009 and update its business outlook for its fiscal year ending September 30, 2009 on Thursday, July 30, 2009. MWI will host a conference call the same day at 11:00 am eastern time to discuss these results and its business outlook.

For calls within the United States you can access the conference call by dialing (888) 554-1432 and international callers can access the conference by dialing (719) 457-2648. Participants will be required to register their name and company affiliation for the conference call. The conference call will also be carried live on the Company's website at www.mwivet.com. Audio replay will be made available through August 14, 2009 by calling (888) 203-1112 for calls within the United States or (719) 457-0820 for international calls using the passcode 5258504 or by accessing the Company's website.

About MWI Veterinary Supply, Inc.:

MWI Veterinary Supply, Inc. is a leading distributor of animal health products to veterinarians across the United States. The products MWI sells include pharmaceuticals, vaccines, parasiticides, diagnostics, capital equipment, supplies, veterinary pet food and nutritional products. The Company markets these products to veterinarians in both the companion animal and production animal markets.