Same here, down to -9F last night, closed all the windows in the coop, but left the front louver flap open (southeast opening).
I had no inside frost on the windows, good sign that the humidity was low inside the coop.
No supplemental heat , just had the water heaters on all night to melt the ice. This morning the hens are laying, and looking for treats.
Considering this is the first year we've had chickens, and also that our temps have been fluctuating from the 50s to below zero the flock is
doing pretty well.
I had no inside frost on the windows, good sign that the humidity was low inside the coop.
No supplemental heat , just had the water heaters on all night to melt the ice. This morning the hens are laying, and looking for treats.
Considering this is the first year we've had chickens, and also that our temps have been fluctuating from the 50s to below zero the flock is
doing pretty well.