Hi ya'll im new to having chickens. I have 2 barred rock 10 week old chickens. I live in Virginia and I was just wondering how their bodies know to bring in some thick feathers. I have them outside in a coop i made and i cover it with a double folded tarp just to make sure so drafts get in there. I have them off the ground and put cardboard, leaves and some straw in the bottom to keep them warm. Will they be okay? Thanks!