She seems better - we think it was a case of several problems happening at once. She doesn't seem to have pain in her hip area since the vet expressed her anal sacs, but she has developed into a very fussy eater, which was making us think that she still wasn't eating. Turns out she just wanted to be hand fed, which I had been doing because I thought she was really sick....
Now she's eating fine, off a plate. It also seems like she was allergic to Puppy Coachies treats. I stopped giving her those because she wasn't eating her normal kibble, and she immediately seemed less lethargic and less miserable.
So yeah, everything is pretty much fine