i have a new kitty in our house, a beautiful black big boy cat that's almost a year old. he's from a local rescue group and is really a laid back cat - great personality. after keeping him isolated for a couple of days i introduced him to my two female cats and so far so good, just a lot of hissing and posturing with some growling from the females, he either walks off or lays down. i know all situations/cats are different but i was wondering how long it averages to be until the girls just accept him/ignore him.