My lead hen raced out into the yard, the morning after our first snow, and then freaked out when she realized that it wasn't just oddly colored lawn! She made such a fuss that none of the other hens would even attempt to leave the pen and I had to pick her up and carry her back as she had flown from the coop ramp, about eight feet out into the yard, and then refused to move. She just sat their squawking as if the snow was trying to eat her LOL Other than that, they don't seem to be bothered by the weather at all.