MWI Veterinary Supply, Inc., together with its subsidiaries, engages in the distribution of animal health products to veterinarians in the United States and the United Kingdom. It primarily offers pharmaceuticals, vaccines, parasiticides, diagnostics, capital equipment, supplies, specialty products, veterinary pet food, and nutritional products. The company’s pharmaceutical products include anesthetics, analgesics, antibiotics, ophthalmics, and hormones; vaccine products consist of small animal, equine, and production animal biologicals; and parasiticides are used for control of fleas, ticks, flies, mosquitoes, and internal parasites. Its diagnostics products comprise consumable in-clinic tests for detecting heartworm, lyme, feline leukemia, and parvovirus, as well as consumable products for measuring blood chemistry, electrolyte balance, and cell counts; capital equipment products include anesthesia machines, surgical monitors, diagnostic equipment, dental machines, cages, lights, and x-ray machines; and supplies consists of syringes, instruments, bandages, IV products, surgical consumables, grooming materials, and other small equipment items. The company’s veterinary pet foods products include foods for specialty diets and premium pet foods; and nutritional products comprise dietary supplements, vitamins, dental chews, and specialty treats. As of September 30, 2011, it served approximately 24,000 veterinary practices in the United States; and 1,500 veterinary practices in the United Kingdom. The company was formerly known as MWI Holdings, Inc. and changed its name to MWI Veterinary Supply, Inc. in April 2005. MWI Veterinary Supply, Inc. was founded in 1976 and is headquartered in Boise, Idaho.