In cold climates, how cold does it have to get in a chicken coop for hens to be uncomfortable? Besides the drinking water freezing, what are the minimal temperatures that chickens can withstand?
I have four hens that I started in the summer in my uninsulated garden shed and now I worry about them with the winter coming. Insulating the whole shed is out of the question. I may run a long extension cord out to the shed to suspend a heat lamp for them, but I still need to know what is the minimum temperature that they can take. Thanks.

Chicken Coop, Chickens, Cold Climates, Drinking Water, Egg Laying Hens, Extension Cord, Garden Shed, Heat Lamp, Minimum Temperature, Temperatures