An animal breeder is a person who breeds animals. These animals may be pets, farm animals, or exotic animals. Generally, an animal breeder is classified by what type of animal they breed. For example, they may breed cats, dogs, horses, cows, chickens, rabbits, or other animals. If someone breeds cats, they are generally called a cat breeder. If someone breeds dogs, they are generally called a dog breeder. This type of labeling system is used for all types of animals. Additionally, breeders may be further classified by what exact breed they specialize in. For example, a dog breeder that only breeds border collies would be considered a border collie breeder. There are nearly endless options as to what types of animals someone can breed.