I have a female rat that is alone and does not have a cage mate due to severe aggression against other rats. I have tried twice now to pair her with another female and all she does is start fights. She is a very sweet girl with me, very loving. She just does not like other rats, lol. I love her to pieces but there must be something I can do to make her less aggressive towards other rats. I don't like her being alone like this although she does seem very content. She gets a lot of free range time outside her cage and like I said she is a total sweetheart towards me. Any insight would be very much appreciated.