Parrotlet with skin condition

I have a 3yo parrotlet (rescued last year) who has a problem with the skin on her back. There are multiple growths that are clustered together. It seems they should be feathers coming in, but instead they appear as feather shafts -- but no feathers.

This parrotlet acts the same as she did before. She is still energetic, playful, sweet, and cuddly. Her eating habils have not changed and she has not lost any weight since this began. She has a balanced diet which includes pellets, (limited) seeds, fruits, veggies, and carbs.

We've taken her to an avian vet twice already. The vet prescribed Avian Rain on one occasion and a Booster on another. These meds have done nothing for her. The vet said to wet down the bird's feathers and carefully remove these growths. We've done this but it creates scarring, they grow back, and the bird suffers from extreme anxiety when this is done, so we've stopped doing this. It is important to note that these growths do not appear to be puss-filled cysts; they are feather shafts. We're searching for another vet since the first one hasn't really helped.

I should also mention that she is a Green Rump/Pacific mix. We're wondering whether her condition is related to the fact that she's a mix...?

Has anyone seen anything like this before? Any recommendations? Thanks.

Gosh, it's good that the condition doesn't seem to affect her in any way. But frustrating that you can't seem to find a solution or cure for it. I just don't know what you can do really, perhaps just leave them alone for a good long time and maybe the feathers will eventually grow? However, I'm not a vet, so I couldn't say if that would be the best for the bird. I think a second opinion with another vet would be a good idea. I would definitely NOT try to remove them again if it causes her so much grief.

We tried leaving them alone for a while and they just got worse. Now it's time to see another vet. The first vet said she had never seen this condition before... Yikes! We're hoping the next vet helps poor little Olive. At least it doesn't affect her attitude or eating habits, but we have to wonder how painful it might be.