One of them was killed unfortunately, but the injured one is going to be okay, I think. I am most worried about some bald spots she has, particularly on her head. We are going into the cold months now (already have freezing temps over night and it snowed last week). Our coop is not heated, and I don't have a way to heat it. She's a Barred Rock. Will the bald spots be at more risk for frost bite? is there anything I can do for her? Will she regrow those feathers, and how long does that take? Thanks!