I have a few pullets that were hatched in April. So this will be their 1st winter. I noticed a few weeks ago one of my barred rocks was loosing feathers. I would find them under the roost. I looked her over and didn't see any signs of lice/mites. The loss appeared to start at her back and no, we do not have an aggressive rooster. You had to move her back feathers to see a small bald patch. These past two weeks she is loosing under her chin and on the back of her neck. I read that most chicken do not molt their 1st year. Doesn't molting usually occurs in September? Her comb is a little pale and she is not laying that often but it gets dark in Massachusetts at 4:30 and I do not supplement light. Should I be concerned? The other girls look good. I do use DE in the coop and sprinkle them all with permethrin.