I posted earlier about how do I know if the cats are being too aggressive - I am now worrying myself sick. Boo, the resident cat, is 11 months. The new arrival, Bella, is 12 weeks old. Boo really plays rough and sometimes Bella puts up with it, sometimes she cries out, sometimes after crying out, she initiates more play. I have not separated them since I thought they were getting along. If I put them in separate rooms now, would that be more traumatic? When Bella arrived and I had her separated, she cried constantly, when I put Boo in the room, she sulked for hours and ignored me. She is still sort of ignoring me over all of this. It has been 4 days of being together - nearly 2 weeks since Bella arrived. Please help, everyone. What do I do?