they will be fineThey are 6 months and fully feathered. Although the coop isn't insulated I did run thick plastic around the run to stop the wind and snow gusts. The girls love telling me about it but seem to be happy and in good health so far. Egg production hasn't slowed down yet.
i dont insulate. as long as they dont have direct drafts they should be good. just remember that having enough ventilation is very important because humidity in the air building up in the coop is not good, it causes frost bite and all sorts of issues and can kill chickens. i dont heat my coop ether. but i get the worry. when i first got chickens i would even go check on them several times a night lol
