I have a flock of 10 chickens. Temps get down in the teens at night and into the 30's and 40's during the days lately due to artic freeze. Just went out this morning and noticed one female RSL has lost feathers on back of neck and some on sides. I can see new feather shafts coming out of skin. She is the oldest of the flock and would be the first to start molting if this were the case. They are about 10months old. I always make sure they have fresh unfrozen water and feed daily. I have also put out extra because of the cold temps. The temp is the only drastic change that has happend lately I can think of. We do not have any extra lighting or heat in the coop and the chickens seem fine. Egg production has diminished by one egg, not bad for the girls. I am just curious if she is molting or having a premature molt? What can i do to help her or speed along the process? Should I get her a sweater or jumper since the temps are so cold? Should she be seperated from the flock to keep safe and warm. I love my chickens and they are a little spoiled Thanks for all the help.