I have a hen that's missing a LOT of feathers. First there was the rooster who practically denuded her, and then there was a raccoon attack that she had to recover from, 2 weeks ago. She's doing fine now, separated from everyone, and I bring her in every night. However, the weather is starting to get cold. We're due for frost tonight. Pretty soon she'll be jumping out of the big box I have her in, and I won't be able to keep her in at night, and it'll be getting cold during the day, too. I really do not want her to go back in with the other chickens, since they'll probably peck her unmercifully. How long does is usulaly take for feathers to grow back?