I have three chickens and five ducks in two separate pens. It doesn't get too cold in Texas but we are expecting a polar vortex this Sunday morning. It is expected to be in the 20s most of the day with a wind chill and feels in the 9 degree range. I know chickens and ducks can survive this weather... we have already had three days of freezing a week ago... but this doesn't make me any less nervous. I treat these ladies like family! Will they be okay? Should I lock them in their coop all day? It is large enough for night time cuddles but not enough for them to get exercise. I have a plywood coop with circular holes for ventilation. Their coop door is rather large (maybe 1.5 or 2 ft x 1.5 or 2ft) which is only lightly blocked with strips of a shower liner.... Is there anything I need to do? I just need to ease my mind a bit.. any response would be helpful!!