Q: I just got two baby ferrets that are 3 months old and supposedly siblings. They constantly rough play with one another to the point that they squeal pretty loudly, as if they’re in pain. I separate them at night, and they share the same play area in the day. Is their rough play normal behavior? I would like them to eventually share a cage.
A: Their rough play is very normal, and there really isn’t any reason they should be separated (as long as they are spayed/neutered).
Much like puppies, ferrets explore with their mouths and learn how to behave through play, especially play with others their own age and size. The squealing is their way to tell each other that play is too much and they need to back off, which is exactly what you want them to do.
If they are siblings, they were sharing space before you got them, so they should be just fine doing so again.