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Show Kinds of Animal Horns There are three klns of animal horns antlers, hollov horns and hairy horns. Antlers are growths of bone covered with skin. As soon as they stop growing, the skin, or velvet, peels off. They grow very rapidly and are renewed each year in the deer family. Cows, goats and sheep have hollow horns. The outside out-side is-of flinty skin, like a fingernail,. finger-nail,. and the core is of spongy bone. Only one animal has a hairy horn the rhinoceros. His is made of long, coarse bristles tightly cemented cement-ed together. |