A gelding is a sterilized male horse. Horses are closely related to the zebra and donkey . Mules and hinnies are the offspring of donkeys and horses. Horses have hoofed feet. The hooves and teeth continue to grow throughout the horse's life.
Horses have a narrow, flowing mane.
They have large nostrils that let them get lots of air quickly. Large eyes and ears help the horse detect predators early, allowing it to run away. The lightest and smallest is the Miniature Horse, a type of pony.