We have 7 hens and we are going into our first winter with them. We have them in a 4x8 coop that is 4ft high and they also have a huge run. We do not have it insulated, will they withstand the winter?! We have a heat lamp that can use if need be, just not sure when and if to use it. Also, we would like to supplement lighting during the winter months but not sure how to do it. I have read to be careful because doing so could cause them to molt at a later date when it is really too cold for them to molt....help!!! THank you in advance!