PS
When the "actual" temp (not the wind chill) is below 10 is the only way I would make sure they are in the coop and consider a small bulb to keep the temp at 10 or above.
When the "actual" temp (not the wind chill) is below 10 is the only way I would make sure they are in the coop and consider a small bulb to keep the temp at 10 or above.