Vigorous companions of cowboys, sturdy workers in the fields, or graceful mounts of equestrian clubs, all horses have a common ancestor: the Eohippus.
The horse is a gregarious animal. It needs its fellow beings for reassurance or to play. It has neither "paws" nor "muzzle" but a "mouth," a "nose," and "feet." It neighs and communicates primarily with its ears: when pointed forward, it is focused; when laid back against the neck, beware, it is angry.