Pine tar is supposed to work great at keeping chickens from pecking. You can pick that up at a feed store. You can also find vitamins & electrolytes there as well. Do you feed calcium? Just a thought. Cat food is good to increase her protein. Until she gets to feeling better, I would definitely keep her from the others. If you keep her in a dark place, she will stay quiet and minimize stress giving her time to regrow her feathers. Make sure she doesn't have blood feathers when you put her back. For some reason, chickens find them really tasty. I would reintroduce her after the feathers get past that stage. That's when the pine tar will come in handy. A paint brush makes the application easy. You may have to reapply for a few days.
Are you having this problem with more than just this hen? I would watch to see if another starts getting picked on since you removed her.
Good luck!
Are you having this problem with more than just this hen? I would watch to see if another starts getting picked on since you removed her.
Good luck!