I had some trouble with some feather pluckers but I have been able to stop it. However I have a RIR who has a bald spot infront of her tail that is 1.5 inch by 1 inch and the feathers are not growing back in this spot. With the temperatures falling I fear she will be going thought the winter with this bald spot. The coop is not heated and temps get down around 0 degrees F for a few weeks of the year. Do I have to worry about frost bite or exposure during the winter? Is there anything I can do for her? Thanks for the help.