Thanks for all the input. I took the advice of removing the heat lamp. All of the hens are again in the coop long before sunset when the door closes. They've tolerated a -15F night this week without problem. (I have Rhode Island and New Hampshire Reds; both cold tolerant) I did put a heated...
I have a flock of eight hens, eight months old. All laying very nicely even during the cold winter months so I think that they're healthy and enjoying life. They have a very secure coop with an automatic door that closes at dusk and opens at dawn. When out of the coop they are in a secure...