What is mare?

Answer:
A mare is a female horse that is 3 years or older, if the horse is any younger, it is considered a filly;)
Some people don't consider a female a mare until they are 4 years old, and some don't call them a mare until they are 5!
First answer by Kudo13. Last edit by Naturalhorsecare. Contributor trust: 31 [recommend contributor recommended]. Question popularity: 1 [recommend question].