fighting rats

I currently have a 21 week old rat who is socialised, and am introducing one that is around 7-8 weeks old now to my older rat. i pushed the cages together, over a series of days and let my older rat smell the young ones cage. As time went on i introduced my bigger rat to the smaller cage. To...

So, my two rats are super close and have been together since day one. They get along 99.9% of the time, but have minor spats every now and then. But recently, I've realized that both of them have bloody bite marks on their bodies. They're fighting, but they still cuddle and all that at the end...

I have two male rats who are 8 months old and are brothers so have lived together their whole lives and never had any problem. Recently, the bigger rat (william) has been picking on the smaller one (james) to the point where he actually gets fluffed up and bites james leaving cuts in his skin. I...

Up until recently I had four bonded rats in a VERY LARGE CAGE, definitely big enough for four rats. Recently two of my beauties passed away after long lives of 2+ years. Since their deaths, the remaining two ratties seem to be acting out, and the little tiny skittish one has been biting the hell...