Interesting - okay - I'll look for permethrin spray at the feed store and clean everything out. Poor girl. I guess the other possibility is that she's being pecked; if I rule out the mites that would be the next thing to tackle.I adopted a couple of hens this past summer, and they came with live. Ew.
I used permethrin spray and sprayed it right on the birds. Then I cleaned out EVERYTHING. Thoroughly. And sprayed everything. I did that again after about a week. Worked like a charm.