One of my hens is missing all her back feathers due to breeding. I gave her a chicken saddle before she lost them all and didn't see that somehow the rooster was still getting the feathers off. The saddle covered her back until I removed it to clean it. I saw all the feathers gone. I took her away from the roosters along with her sister that isn't as bad. I've had them separated for almost a month now and her feathers haven't grown back. Is there something I should be doing? I've been giving them feather fixer and oyster shells since they are still laying. It looks a bit dried. Should I put salve on it? Will it not grow back until she molts? I haven't had to deal with this before, so thanks for the help.