Horses

Colt - A young male horse, 4 years old or younger Filly - A young female horse, 4 years old or younger Foal - A newborn or very young horse, male or female Gelding - A male horse that has been castrated, or gelded Mare - A mature female horse Stallion - A male horse that has not been castrated Dam - The term give to a mare when she becomes a mother Sire - The term given to a stallion when he becomes a father When A Horse Isn't A Horse
A mule is a cross between a male donkey (called a jack) and a female horse (called a mare). Mules are usually sterile.
A hinny is a cross between a male horse (called a stallion) and a female donkey (called a jenny). Hinnies are usually sterile.
The pretty little foal to the right is about 12 hours old. She has a horse for a mother and a donkey for a father, which makes her a mule. Mules are known for having very long ears.