My brother was an idiot tonight and let Mandy loose while we had Luka out. Of course she went after Luka and bit her, but there was no damage and Luka didn't even seem phazed by it. Hopefully this was just an "I'm the dominant one" fight. We let them touch a little bit after that, with full hold on both, and they did fine. Still not ready to let them loose, though. Amazingly, they're all sleeping on the floor right now -- Nova and Luka are each in a seperate crate and Mandy is on her bed. Let's just hope everything goes smooth in the morning!