I know the sensible answer to this question is "yes!" but I'm trying to look at it logically. I've just had my older cat pts, leaving me with a 4 year old cat, who doesn't seem to like other cats very much. I know she only meets them outside where its all a bit territorial, but her first response is always hissing and bad language. She's not exactly pining for the other cat either. She might get on better with a kitten as it wouldn't be direct competition for a while, but I'm now 60, so I'd be risking getting a cat that would outlive me, which doesn't seem fair. Also, much as I love kittens, they're quite hard work, and there are many more adult cats looking for homes.