A hoof is a hard, protective covering on the feet of certain animals, primarily horses, cows, and deer. It is made of keratin, the same material found in human nails and hair. Hooves help animals walk on various terrains and provide support and stability. Hooves are typically divided into two main parts: the outer wall and the sole. The outer wall is the visible part that bears weight, while the sole protects the sensitive inner structures. Proper hoof care is essential for the health of hoofed animals, as neglect can lead to pain and mobility issues.