Sheep are mammals of the family Auchenipteridae in the order Artiodactyla. Full body and dense fur; Short head; Rams often have spiral shaped large horns, while ewes have no horns or small horns; There are tear troughs on the skull, and the nasal bone is relatively raised; Four hooves have toe glands; Sharp mouth, thin and flexible lips; The weight ranges from tens of kilograms to hundreds of kilograms, and the natural lifespan is about 15 years. Sheep originated in Central Asia and gradually expanded to various parts of the world. Gentle temperament, strong imitative and sociable, with a habit of following the leader sheep to gather in groups. Eating short grass, as well as coarse and hard straw and branches. Artificially raised animals can be fed with feed.