Oreodont

Merycoidodontoidea, sometimes called prehistoric "ruminating hogs," were a family of cud-chewing plant-eater with a short face and fang-like canine teeth. As their name implies, some of the better known forms were generally hog-like, and the group was once thought to be a member of Suina, the pigs, peccaries and their ancestors, though recent work indicates they were more closely related to camels. The scientific name means mountain teeth, referring to the appearance of the molars. Most oreodonts were sheep-sized, though some genera grew to the size of cattle. They were heavy bodied, with short four-toed hooves. Unlike any modern ruminant, they had long tails.