I have a nearly 4 year old neutered female cat. I have been thinking about adopting another cat, but I fear they won't get along. Current cat is not really social, rarely likes being touched, instead requires attention: playtime, being near (but far enough), etc.
What are your experiences with second cats? Are there age / gender combinations which are the safest?
Edit: thanks for all the replies! Forgot to mention that she is an indoor cat.
Opposite experience for me, we went from 1 to 3 cats by adding the new cat every 6ish years.
Didn't really do anything special, just brought the new cat home and that's it. Maybe has to do with all of them being from the same breed (Oriental shorthair) and the specifics of the breed itself