Sheep were first domesticated thousands of years ago for their wool, meat and skins.  The females are called 'ewes' (in Cumbria often pronounced 'yows') and the male sheep are called 'rams' (Cumbrian farmers usually refer to them as 'tups').  The offsrping are lambs.  Some breeds have horns and some don't.  They have a coat of wool, and their feet have two toes.