Sheep are mammals with thick, woolly fur, and hoofed feet. Sheep were domesticated (bred to be tame) about 10,000 years ago. Domestic (tame) sheep are farmed for their wool, meat and milk. There are also many types of wild sheep; they are closely related to wild goats. In 1997, a sheep named "Dolly" was the first animal cloned (grown from a cell from another adult animal, making a genetically exact copy of the original animal).
Names: An adult female sheep is called an ewe; an adult male is called a ram. Babies are called lambs.
Anatomy: Sheep range from about 2 to 4 ft (0.6 to 1.3 m) tall at the shoulder. Some types of sheep have horns, which are often curved. The horns grow throughout the life of the sheep.
Diet: Sheep are herbivores (plant-eater) that graze on grass, leaves, twigs, and young plants.