I have 3 cats, all were under Megan's paw, for varying lengths of time. Enter Gina, she wants to play with all 3 of them, only Spooky has started to accept her, the other 2 cats are really my son's cats. We have a gate up going from the living room to the hall way for the other bed rooms in the house. Gina isn't allowed past it, which only makes her want to play with the others all that much more. Give them time, and make sure your oldest female, doesn't always get in the cats face. Good luck.
Cheers Quad & Gina
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RIP Megan 3/1998-5/28/2013