When our big Sid was a kitten, he wore a collar with a bell to warn his older "auntie" Crystal that he was wanting to play. (She was 15 years older than him!). They never became best buddies but did learn to tolerate each other's presence.

None of my pack of three snuggle with each other - sigh. But that's ok, it is who they are. They do enjoy playing chase games with each other and there are very few skirmishes.

When our little girl Jan growls at Joxer, we just think its funny because it is just who she is. He doesn't take it personally.