Hey there, my husband and I have 3 girls of our own (Kitai, Ana and Tali) and all of them have become EXTREMELY aggressive, lunge biting, biting threw the cage, attacking when we try to change food and give them fresh water. We are at our wits end with them and to be honest it's breaking our hearts. We've tried treat training, scent training, sitting near them and speaking quietly, and everything else that has been suggested to us by other rat owners on what to do, looked up articles, groups, etc. We are exhausted and my husband has all but given up on really interacting with his rats. Their aggression is really bad, they've all drawn blood and one even bit him in the ear something she's never done, it's only been fingers and hands before and she went for his face. Please help :[!