Hoof shapes are different as well, donkey hooves are smaller and rounder, with more upright pasterns. The legs should have good bone, but lots of donkeys have long thin legs with tiny feet. Larger donkeys may appear opposite, with big, heavy legs and large round feet. Good legs and feet are very important for mules that are trying to find a mate. This is because, for breeding, a good foot is more liked than a large body on small legs and feet.