A ruminant, from a physiological point-of-view, is any artiodactyl mammal that digests its food in two steps, first by eating the raw material and regurgitating a semi-digested form known as cud from within their first stomach, known as the rumen. The process of again chewing the cud to break down the plant matter and stimulate digestion is called ruminating. Ruminating Mammals include cattle, goats, sheep, giraffes, American Bison, European bison, yaks, water buffalo, deer, camels, alpacas, ll… (More on Ruminant)