Okay, I saved up for Major Domo, and, at first he was great, but for the last 5 days (Sims days I mean) he stands in the same spot sort of fidgeting, like he's in a loop or something. It's not like there's nothing for him to do, there's garbage and puddles of pee right in front of him. He's not stuck behind anything. I forgot to fire the maid, but that wasn't a problem before. When I'm in 'Buy' mode and try to sell back his tree, it won't let me click on it, probably because Major Domo isn't in it. I can't click on him either, whether in 'Buy' mode or not. What could be the problem and what should I try?

Why don't you just sell it and buy a new one with the money you get from that? That is what I always do if the maid forgets to clean the Sonic Shower as this is useless when it is dirty.

Um cage him and then sell the tree then buy a new one. Also you should use freeall and midas cheats(see cheats page)

to send back to his cage CLICK ON THE TREE an he'll piss off