examples of hooves
Ungulate mammals can have an odd or even number of toes (from one to five); the number can vary for the forelimbs and the hind limbs.
four-toed hoof 
The pig, wild boar, hippopotamus and elephant are the principal animals with this kind of hoof.
three-toed hoof 
The rhinoceros, for example, has this kind of hoof.
two-toed hoof 
The deer, giraffe, bull, sheep and camel are the principal animals with this kind of hoof.
one-toed hoof 
The horse, zebra and ass, for example, have one-toed hooves.