You’ll have to make sure the “old” cats don’t gang up on either of the new cats.
They hiss and growl, but it has not come to scratches and blows.
They’re mellowing out already. Oddly, our itty bitty kitty, Shadow,
is the growler. Bobbie is adjusting more quickly. Midnight and
Tootsie are pretty laid back. We adopted them from a room full of
cats, so they’re probably pretty good at making friends.