What is Hoof?
[[Image:Masai_Giraffe_right-rear_foot.jpg|thumb|200px|right|This is a giraffe hoof.]] A '''hoof''' is the [[foot]] of certain animals known as [[ungulate]]s (such as deer, cows, pigs, sheep, and giraffes). These animals walk on their toes. The toes have a hard cover made out of the same material as [[fingernail]]s. This is called [[keratin]]. [[Category:Animal anatomy]]