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 try my best to separate them when it happens but sometimes william even bites me when i’m moving him away! He’s never shown aggressive behaviour before now and used to love being stroked on his head and cuddled. I’m really worried that james will get seriously injured but I don’t want to separate them because I have no other rats or another cage so they would be lonely. I really love them both I’ve had them since they were 3 months and never had any problems before 
what shall I do?
what shall I do?
