I have a 3 chinchillas that I want to be able to live together in one large cage. I have a bonded pair that I rescued about 6 months ago, and my single chin that I've had for about a year and a half. They were getting along for about 2 weeks, after slowly being introduced, until I decided to bring out the dust bath during floor time, Rosie (the single female) tried pushing one of the other chins out of the dust bath, and they got in a huge fight. They sprayed, and bit and barked it was bad. I separated them right away, and ever since then they've been extremely aggressive. Help?! They're all females, by the way.