"Meet Orq. He cave boy. Meet Woma. He woolly mammoth. Orq love Woma. A lot. He want pet. Orq's mother say Woma shed. And smell. And not housetrained. Yuck. Woma not allowed in cave. But Orq has plan. Kind of."
When Pig plops into his sty at bedtime, he finds Cow sleeping there and must send her off to her stall, setting off a chain reaction of animals being awakened to move to their own beds.