Sheep are quadrupedal, ruminant mammals typically kept as livestock. Like most ruminants, sheep are members of the order Artiodactyla, the even-toed ungulates. Although the name sheep applies to many species in the genus Ovis, in everyday usage it almost always refers to Ovis aries.
Sheep are some of the animals that the crew meets while they look for monsters in barns. They also save Sheep from predators, specifically Werewolves.