How many toes do horses have on each foot?

Modern horses, along with other equids such as asses and zebras, have a single solid hoof on each foot. They are the only mammals that walk on the tips of single digits.1

While modern horses are characterized by this single-toed structure, they belong to the order Perissodactyla, a group of odd-toed ungulates that typically possess either one or three hoofed toes on each hindfoot. The evolutionary history of the horse shows a transition from multi-toed ancestors, such as Eohippus, which had four toes on the forefeet and three on the hind feet, to the single-toed form seen in the modern genus Equus.213