We have a beautiful 5 year old male cat Mr Darcy, he was a rescue so we didn't know his history of any past cat "family", we wanted a cat to keep him company, so we got an 8 week old femail kitten Honeybear.

We kept then apart for 2 weeks, occasionally holding Honey for Darcy to see. This would result in hisses and Darcy going off in a huff for hours. After two weeks we allowed supervised visits, Darcy was curious, Honey was a little frightened, always ended in hisses and huffs and the occasional swipe by Darcy.

It was about 6 months later that Darcy finally started to come around, and would chase and tackle Honey in the garden. She was a little scared but enjoyed the fun. It was only about a year later that they were really relaxed together, but now "look out" for each other all the time, and stand up together against other cats.

I would say that Darcy definately responded better to a single little girl kitty (although if she was a little older we could probably have introduced them quicker) , as Honey had 2 male kittens Merry and Pippen. They tend to keep to themselves when it comes to playing and certainly challenge Darcy a lot more with swipes.

Still Merry and Pippen are now a year old, and the whole cat family are quite happy to sleep on our bunk beds together.

All I would say is IT TAKES TIME!!!! I at times used to despair at Darcy and Honey getting on, but they are buddys now.

Good luck!