My two male rats recently got into a serious fight, one of them had so much bleeding he was fainting, and was put on a prescription by our emergency vet. I've separated the two rats into different cages, and I let them out at different intervals. Lately, I've noticed when I let one out, they run to their past cage mates cage and try to get in hyper actively, nuzzling each other through the cage bars. I don't know what to do, because it seems like they want to reunite but I'm afraid the next tangle could occur when I'm not home and be more serious. Any advice?