What kind of animal is the bone of the third brother?

Cattle. The third brother bone refers to the third place among animals, the first place on the list is mouse, and the second place is weasel. The third place is cattle. Cattle belong to the family of Artiodactyla, Bovidae and Bovidae. They are physically strong, and their necks, shoulders or backs are often bulged by spine and developed muscles, and they have legs suitable for long-distance running.