This is our first winter with chickens. We got them in the spring and have always kept the food and water in their run. We're in northern Illinois and the tempuratures are going to be in the single digits and even down to -8 on Sunday. Today it was in the upper teens and is now 10 degrees with lots of wind and I haven't seen our chickens in their run at all. Should we move their food and water into the coop during these extremely cold days when they don't want to leave the coop?