Mules have been said to have the body of the horse with extremities of a donkey, whereas hinnies have the body of a donkey and the extremities of a horse. Because a donkey mare is smaller than most horses, hinnies are generally smaller than mules. A hinny's ears are shorter than a mule's, his mane and tail are thicker and longer and his hooves are rounder. Hinnies differ from each other more than mules do, from being almost identical to a horse, to being mule-like or nearly indistinguishable from a donkey. Mules have long ears, a thin, short, possibly upright mane and a tail which in part has shortish hairs but also long hairs like a horse tail. The mule's tail can be much fuller and longer than a donkey's. Her legs, like the donkey's, are straight, and she has small, hard, straight-sided hooves.