I have a dillema. I got a Calico in early December when she was about 4 months old. Her name is Callie, she's a sweet cat, and i love her very much. But a couple days ago I got new 3 month old Calico. The size difference between them is large. The new cats name is Paddy and Callie is acting abnormal around her. Callie has been hissing, growling, and batting at her. She's sending mixed signls too, one second she's licking her, almost as if she's mothering her, next second she's growling and hissing. I know it's normal for cats to do this around newbies,but it's getting serious. Now Callie's pouncing on her and even biting at her neck. What should I do. I miss the old sweet Callie, but I don't want to give back the new one. I'm also wonering whether Callie is mothering Paddy or attemping to hurt or even kill her