Male ferrets are called Hobs and females known as Jills. Both equally good as pets. The male can be two and a half times the size of the female.
Both sexes make equally good pets. The hobs have an odour when kept intact, some people have them castrated as this removes the odour.                                 The Jill can be problematic if allowed to remain in season unmated. They can be mated to a vasectomised Hob , spayed or given a “Jill jab” by a vet. I recommend spaying a pet not required for breeding.
The picture displays the location of the spaying operation. It soon healed.   

Molly’s operation.