I never thought that keeping a new cat separated from one that had been there before was a good idea. They both know each other is there. The best is for sometimes the fur to fly. Calicos can have cattitudes. Yes, there will be some hissing growling and wacking but in time they will get along. Sometimes it takes just a few days, sometimes it might take months. Cats protect their home and dont like new comers. It is a fact of life
