This is my first fall season with chickens... pardon if I am asking basic info. Days are shorter, nights almost to freezing now. I have a light on in the coop that goes on at 2 am, off at 9. That leaves the chicas getting 14-16 hrs of light per day. The Welsummer, who has been averaging 5-6 eggs per week for a couple of months now suddenly stopped last week, and she looks like she's fluffing herself up when she's outside. Is this her way of keeping herself warm? The other 2 are laying normally, all are behaving as usual, don't look sickly. should I be concerned or is this just normal seasonal transition. Thanks!