My sister's Barred Rock, Kiki, is in mid-molt and I would say about almost half of her body does not have feathers. We had our first bad freeze last night and I put a hen saddle on her to see how she would do. I checked her out in the morning and she had a little bit of frost-nip so I brought her inside and it went away. But she had been shivering and I'm worried it could get worse if I don't do anything. Any ideas on how to take care of her and a way she can stay inside the coop with the others but stay warm as well? Here is a picture of her: