If he is still intact he is called a stallion, if he has been gelded (neutered) than he is known as a gelding.
A stallion, or of he is gelded ( neutered) a gelding
A mature male sheep is called a ram.
A male horse is called a stallion. Stallions are mature, intact adult male horses capable of reproducing. They are often used for breeding purposes or as working animals in some equestrian disciplines.
Male rabbits are called "bucks", like male deer.
A stallion if it's intact. A gelding if it's been castrated.
A mature male pig is called a boar. A mature female pig (that has produced offspring) is called a sow.
Also called a buck.
A mature female goose is called either a hen or a goose. A mature male is called a gander.
A stallion and a desexed male horse is called a gelding. a pony. (In order to be a pony they have to be less than 10 hands tall)
The young of a donkey is called a foal.A young male is a colt but a mature male is a Jack.A young female is a filly but a mature male is a Jenny
A female duck is called a duck or a hen as a male is called a drake
A mature male sheep is called a ram. Rams are known for their large, curled horns and are often used for breeding within a flock.