What is a male horse under the age of four called?

A male horse under 4 years is a colt A female horse under 4 years is a filly a male horse over the age of 4 is a stallion or a gelding is he has beem castrated a females horse over the age of 4 is a Mare, these should never be spayed, you just have to lve with them even in season! Also counts on ponies