At the rate this animal grows, it'll never be put out to pasture. Animal Health International is one of the largest distributors of veterinary products in the US, selling pharmaceuticals, vaccines, medical equipment and supplies, animal feed and supplements, and livestock equipment and supplies to retailers, veterinarians, and the livestock industry. Altogether it sells more than 40,000 products from 1,500 manufacturers via warehouses and a website. The former Animal Health International was bought by rival Lextron in mid-2011; the combined entity continued under the name Animal Health International. Other companies in the Animal Health International family include DVM Resources, TW Medical, and Walco International.