I've got a feather eater! Watched her pick feathers off the back of several other hens tonight. I bought a bag of feather fixer feed (18% protein) thinking that maybe they're a little deficient and she's trying to play catch-up.
Hoping that with the warmer weather I can give them a little more range time too and that might help.
I don't really have a means of separating her and resetting her place in the pecking order short of putting her in a dog crate in the garage. If you have other suggestions that might help with the situation, let me know.