Actually, I've found that they enjoy each other's company so much they seem happier overall than just having a single. After having my 3 at the same time and seeing how they enjoy each other, I'll never go back to just having a single cat.
Aww wow that’s awesome! I’ve been thinking about getting a second one since she seems kind of lonely since Gator died but I hate changing litter boxes so I don’t know if I want two at once but I think I would be more than willing to suck it up if it would make her happier. She’s a pretty social cat so I think she would like a friend. But then again she is 9 years old so I’m not sure if she would or not. But she’s pretty social so I think she’d be fine.