The temperature is about 5-10 degrees. We put some plastic around parts of the coop and put hay in both coops. But I'm still worried about our chickens. We've been feeding them extra as well. What else can we do? I thought about putting a light bulb in there, but hesitate for 2 reasons. One is that I heard heating the coop makes the chickens less tolerant to the cold. The other is that i worry my roosters will crow all night. My neighbors haven't complained yet, but that could tip the scale!! We really don't have electric out there anyway.