zero degrees

Hi Y’all! I am attaching a picture of a large cage I am thinking of putting insulation on the outside of this & protecting with wood. In Illinois- it gets COLD for about 1 month a year. I thought this might help my dozen hens. It is a very TRYING stressful month when they cannot go out &...

Now that the temp is below 10 degrees (and regularly below 0), I have put a light in the coop for some heat. I keep it on from dusk to dawn. However, I worry about the chickens not having any darkness. So, the question is which is more important? warmth below 10 degrees or darkness (having a...