I had a RIR that would molt in the coldest part of every winter. We had weeks on end when the temp was below 0*F. She looked like she belonged in the poultry case at my local Hannaford store. In spite of the cold and her nakedness, she came through molt just fine. They are far more resilient than we give them credit for. Do you have plenty of bedding in your coop? You could bank around it with bags of leaves or hay bales.They are RIR (Rhode Island Reds) I did go to the Royal King and picked up some hanging treats, meal worms, vitamins for water, electrolyte, life-lytes mega tab vit/supplement for poultry. Maybe I am going overboard but I have 2 water bowls one with the vitamins and other plain. I have never seen her so bare (moulting) then right now and about 19 degrees tonight. I ordered her a apron cover but will take 2 days to get here. They have a coop with blankets on top of roof. What else can I do?