My African grey has been over preening and I find a lot of down like feathers on the floor (not big ones). Her feathers look droopy and she’s constantly itching herself and looks uncomfortable when itching. I think she may have mites as the vet said that she’s completely healthy. I doubt it’s a molt because her big feathers are pretty much the same she little to none big feathers have fell out. She has bald spots under her wings and behind her back deep in her plumage that are visible when she stretches that were never there before. She usually plucks behind her back and under her wings. I noticed today that when she was asleep she would randomly get up and itch or preen herself aggressively. I also noticed white dots on her back feathers but they didn’t seem to move. Any advice?