In my experiences it's best to close up the coop at the temperatures we are expecting. Block any drafts. Your coop will still have some ventilation due to the high winds blowing through the walls. Most moisture will freeze before it gets vented at temperatures below -20 Fahrenheit.
I personally have always closed stuff up, and thickened up the bedding. Some birds will get some frostbite at temperatures below that -20 no matter what you do. Your job is to make sure birds can hold onto body heat. They will sit close to share heat as well.
Whether to add heat, that's a personal decision. I personally don't want the risk of fires.
I personally have always closed stuff up, and thickened up the bedding. Some birds will get some frostbite at temperatures below that -20 no matter what you do. Your job is to make sure birds can hold onto body heat. They will sit close to share heat as well.
Whether to add heat, that's a personal decision. I personally don't want the risk of fires.