I live in MN and we decided to plastic up the run to keep the snow out. Granted we haven't have much snow, but the outside ground is as solid as a rock. The inside run is as sandy as normal, which equals happy dirt baths! On the warmer days 20 and up, the water stays outside in the run, which never freezes! I bring it in at night. Here's our finished run, we did uncover a little more plastic for ventilation. The chickens have been very happy even though there has been no free ranging due to the 3 sets of hawks(2 pair of redtail) hanging around. My neighbor recently had an attack and EVERY time she lets them out, the hawks circle above her flock.