I have two cats, a male and a female. The male shows absolutely no interest in the chins when in their cages, however, if I'm sitting in the office holding one, he'll sit and stare with his tail twitching (a hunting signal). Even if your cat(s) seem to be indifferent, the minute your chin starts running, they WILL go into predator mode and your chin WILL be injured or hurt. It's just nature. Overall, cats + chinchillas = DISASTER!