[T.W.]

I have a CAG that plucks and a cheryyhead that plucks and a plucked quaker, they all came like this to me. The cherryhead now has half a chest of feathers and like 1/4 on the other side. The one quaker, doesn't look like she will ever grow feathers back, she must have been doing it a long time. My CAG only recently started to stop picking and has more feathers than he ever did, even tail feathers, I posted what I have been doing for him in the African Grey section, under mY CAG growing in tail feathers.
As long as a vet clears him of any medical reasons for the plucking, you can start with a good diet, fun destructable toys, aloe sprays.
But you have to be prepared that he may always do this and love him regardless. I don't think I would ever consider putting a collar on any of mine, I think that would be an added stress, unless he were truly barbering himself and bleeding and had open sores or something.
Mine may be starting to feather up, but tomorrow they could be bald again, and I have to deal with that, it doesn't bother them a bit!!!!
There are quite a few pluckers on here, so I'm sure another will be along very soon with some more great ideas and remedies, Good LUck with your Fid, and love him no matter what he looks like, that's the way they love us!!
And I am in no way suggesting that you do not love him, it's just some people only want a pretty bird, and beauty is in the eye of the beholder!!