You need to have a three sided shelter to keep your sheeps in. Sheeps mostly eat grass, clover, forbs and pasture plants. You need to have plenty amount of grass for the sheeps to feed on. You also need fences to prevent the sheeps from running away and prevent predators from entering. If you don't have enough amount of grass then you also can give them hay. Sometimes grains are also given to sheep for nutritional values. You must give the sheep fresh water too to keep them healthy. Usually the sheeps will be sheared once in a year.