We have an Alaskan Malamute, that would use the chinchillas like a chew toy if she ever got a hold of them, 2 cats - one b/w shorthair and a ragdoll, 4 hamsters (in my kids rooms). We pretty much keep all the animals seperate to be safe. When Icee, our dog is in, the cats stay out of sight. The chinchilla's door is always closed, partly because of the other pets, partly because of my 3 1/2 year old twin boys!