quote :
Maybe he just tried to crossbreed it with a bird.
Remember biology class? You can only crossbreed closely-related organisms.
Most breeding (dogs, cats, horses, fruit, flowers, etc.) involves individuals of the
same species.
Occasionally it is possible to breed different species in the same genus, but this usually results in non-viable or infertile offspring. For example, a mule is a cross between a horse and an ass, and is infertile.