Poor Coco
Someone on this thread (I think
@enigma731 ) mentioned that the antibiotics she's on could be making her feel lousy. That makes a lot of sense to me. I know strong antibiotics can do a number on people sometimes, so it wouldn't surprise me that birds can have trouble dealing with the side effects too. While she's on meds she'll probably won't be quite herself and that's ok.
I think you just gotta push through it as you and Coco have been doing. Your providing her with excellent care and she has a fabulous vet. Feel better soon sweet Coco