balding chicken, help!

[Nanny Deb]

Took me a while to figure out how to post as its been a while. but please any help is appreciated! I have a chicken (I call her Mamma Chicken) who is pecking her own feathers out.. Shes not buggy, or being picked on. I have a large area to for chickens to roam 20 x 30 (ish), Guinea fowl in an connected ajastend area and have their own coup. the chickens have a 8 x 10 coup.... I have one roo and 7 girls, all seem well But this one.. She looks horrible with only 1/2 her feathers... Ive tried everything.. Ive got her separated.... i tried all I can think of, bathed, debugged, using peck no more, soothing sore spray, and coconut & sunflower oil. Any Ideas.. wish there was a chicken cone to put on her lil head. Love this gal and hate to see her this way.

 

[Poultrybonkers]

shes overmated by the roo shes his favorite

 

[coach723]

That does look like rooster damage. She is likely more submissive and is getting over mated.
You can use a chicken saddle/apron to protect her back until feathers come back in, and that likely won't happen until she molts.
http://www.hensaver.com/hen-apron-saddle-styles-colors-prices.html
https://www.backyardchickens.com/threads/free-chicken-apron-saddle-pattern.424354/#post-5201261

 

[Nanny Deb]

i thought that too but she is pecking her own feathers and 1/2 her chest is bald too.. But I have watched her closely and I have had her separated for almost a week.. she keeps pecking her feathers .. Its like maybe she developed this habbit.. she went thru the winter looking like this.. and is not getting better.. Just gave her a bunch of tuna. Maybe she needs more protein?

 

[Nanny Deb]

That does look like rooster damage. She is likely more submissive and is getting over mated.
You can use a chicken saddle/apron to protect her back until feathers come back in, and that likely won't happen until she molts.
http://www.hensaver.com/hen-apron-saddle-styles-colors-prices.html
https://www.backyardchickens.com/threads/free-chicken-apron-saddle-pattern.424354/#post-5201261

I didn't think about feathers not growing back until she molts... hmm.... so you think she is ok to put back with the crew. Just keep her in jacket?

 

[coach723]

There is a mite called a deplumbing mite, it's microscopic and causes them so much irritation that they will pluck their own feathers trying to get relief. If you have a vet that will do a skin scraping for you, they can rule that in or out. It is not a common mite, but am just covering all the bases. Not enough protein can contribute to feather picking also, so upping the protein may help if that's the issue. If you are feeding a layer feed, then switching to a flock raiser or all flock type feed has a bit more protein in it, and may help. You will need to provide oystershell in a separate feeder all the time for the laying hens that need it. The extra protein will also help them through molt, when that happens.
I still think it looks most like rooster damage, and time and molt should take care of it, but covering the bases.