Ultimate Horse True or False Quiz Do you know your horse fact from your horse fiction? Test yourself with our fun horse quiz below. 1. Horses can vomit. True False2. Horses have the largest eyes of all land mammals. True False3. Horses are colour blind. True False4. Horses can only breathe through their nostrils / nose. True False5. Horses have a gallbladder. True False6. Arabian horses have one less rib on each side. False True7. Equestrian events where included in the original ancient Olympic games. True False8. Foals are usually born without any visible teeth. True False9. Like cows, horses have four stomachs. True False10. Typically, male horses have more teeth than female horses. True FalseTime is Up!