I do sometimes worry about Margaret being lonely. I know chins are naturally herd animals....but at the same time, they don't always seem to want a companion. I grew up keeping rats, and one of the cardinal sins of keeping rats is to keep them alone, because they tend to get super depressed without at least one cage-mate, so a part of me still has that mentality. I know rats and chins are very different critters, but I still can't help but feel bad that Margaret doesn't have anyone to talk to, even in a separate cage.
I just try to spoil Margaret to make up for the fact that she's a lone chin. I try to spend as much time as I can with her (usually around 2 hours on weekdays, more on weekends), get her out for playtime every day, make sure she has plenty of toys and chews to keep her occupied and enriched when I'm not home, etc. She seems happy enough as far as I can tell, and she's become very bonded to me. Always runs to the door of her cage to greet me, hops into my arms as soon as I open the door, loves pets and scratches and will even tolerate some cuddles ....I'm also the only person she doesn't spray pee at, haha (well, at least not for a while, she did get me right in the face a few times earlier in our relationship).