The Horse Horses belong to the equus family. Equus comes from the ancient Greek word meaning quickness.
Horses are mammals in the same family as zebras, mules and donkeys.
Mares produce milk for their young and will feed them for several months. Within 1-2 hours of birth a foal is able to stand up and walk. Foals can focus their eyes almost as soon as they are born and cut their first teeth within a week. They are fully grown by 3 - 4 years of age. Horses love to eat short, juicy grass.