If it's not appropiate, I do apologize!

Skunks, while not a popular pet in many areas, are available in a domestic variety. Many early settlers kept them, because even a descented skunk deters predators from chicken houses and such. They're behavior is similar to a cat. Currently, there are several states that permit skunks as pets, though many states do not recognize rabies vaccinations on them, which is concerning since it means the family pet will be put down if it bites someone.

But back on topic...there are a variety of terms for a castrated animal, such as capon for an ex-rooster...Is that more what you were looking for?

tempus edax rerum