I have 3 Isa browns and a Barred Rock. The Isa Browns I bought as chicks in March so they are almost a year old. One of them I noticed has a patch of feathers missing at the back of neck. I can see it looks like a porcupine in that area. Is this the start of molting for her? The month of December I got no eggs from any of the girls. Within the past 2 days I got 3. There is no way for me to tell who is laying what. I wish I could figure it out as someone is laying them on the ground. This is my first winter having chickens, so everything is new to me.