Robert's wife gave him a lamb which turned out to be a ram whom they named Billy. Billy adored Robert who'd take him for walks like a dog, although his lead was a strong chain. He hated everybody else and would charge at anybody who approached. The postman took a dim view of that. After 10 years, Robert decided Billy was too unsociable and sold him to a sheep farmer. Billy made the farmer very happy for 5 years as he fathered 300 lambs. He then went mad and was killed.