I have a male cat, Rocky, that is about 5 years old and I would like to adopt another cat. Rocky used to live with another cat a couple of years ago and they tolerated each other. The other cat died and now I would like to adopt another cat. I'm not sure if I should adopt a kitten or an adult cat. I'm guessing that Rocky would tolerate a kitten better. I'm also unsure if he would get along with another male cat or female cat better. I would like to get an experienced opinion. Thank you.