We live in MN and our flock has survived our winter months just fine for the last couple years. However, we are expecting record low temperatures in the next few days. I'm talking -20 degrees actual temp (-50 with windchill). Cold that we haven't seen in at least 20 years. I'm wondering if anyone knows the sustainability of chickens in that type of climate. They have two heat lamps and lots of hay in their chicken house and approximately 4ftx4ft run. The run is covered with tarps about halfway but the whole bottom half is exposed for ventilation. Yikes!