Good morning! I've read here and there of people using hay bales to make a lil extra cubby hole for warmth inside the coop for winter. I was thinking about this last night and wondering how it works? First, I know they will want to roost at night-so do the bales need to be stacked pretty high? I would imagine the bales would also get pretty nasty in a hurry? My coop is kinda big for the # of chickens I have and am trying tofigure out the best way to give them as much warmth without adding heat as possible. Has anyone used hay/straw bales tunnels?