[Slings and Arrows]

I'll echo the general opinion of this thread: Best method to get them used to each other is time plus making sure that both sets of cats have secure spaces.

[Outlaw Woman]

You're right as rain and hope my comment was taken in jest. I can't speak for anyone else; haven't been in the same situation but I do take in strays/rescues. Well my female cat is not appreciative at all but I simply keep them apart and bring in the newbie for 'visits' from the garage. Usually takes about a week.

Of course 'she' still doesn't like it but she is only hostile if they're in the same room. Nah j/k. They sleep in the same bed (lots of distance between) and not too much hissing goes on. I swear though, if she had opposing thumbs, it would be a totally different story! :)

[LucyT]

Thanks for the ping, S&A.

When a new cat arrived in our household where other cats were already residing, I'd give all cats a bath with warm water, using a small amount of baby shampoo, and rinsing thoroughly. Then they'd all have the same body odor and the old cats accepted the new cats.

Occasionally adult males will eat kittens, so your male cat might think those little kittens are prey; perhaps keeping them separate until the kittens are quite a bit larger would be best.