Anna the naked Liege Fighter hen

[Kathy Golla]

Most vets don’t know about depluming mites. They can’t see them or scrape them. They are inside the feather shaft.
Did he pluck a feather and cut the shaft open and put it under the microscope?
It’s super common to only have one hen with the depluming mites. All chickens have them, but most often those that are under stress or are immunocompromised “activate” the mites or whatever the right word is.
But, if you feel like in your past treatment you have already done the long term ivermectin pour on treatment (once a week, on back of neck, for at least six weeks, then again in another month), then it probably isn’t depluming mites.
It could be that whatever she has now has become resistant to ivermectin and permethrin.
But most likely with the treatment you’ve already done, I’m guessing it’s a nervous disorder.
Maybe try switching her feed?
What you are looking for is for her to stop overpreening, right?
Have you tried a baby T-shirt over her?

 

[Eggcessive]

This doesn’t explain her past self-picking, but she also may just be molting right now. Look for the presence of new pin feathers, and see if those get pecked out. Some chickens will just sit still while a flock mate picks their feathers while on the roost or sitting around. Making her a lightweight T-shirt is a good suggestion.

 

[altair]

I've always wanted some of this breed, how lovely. What is her diet like?

 

[so lucky]

I read that on other birds, such as cockatoos, they can permanently damage the feather follicles by over preening, to the point that feathers will no longer grow. Could that be the case with Anna?