Feather pulling

A couple of weeks ago we noticed that our hens were all missing feathers on their backs and butts. We thought it could be mites, or feather pulling. Well, I found the feather puller. I caught her in the act of attacking 4 other hens. I noticed she is the only one without bald patches. I have separated her from the rest, by putting her my laundry room in a dog crate. Now what? Do I keep her there and then reintroduce her after a period of time, or should we just eat her.