If one has a very simple coop with no windows, heat, insulation, or light, just one main entry door on the west and one smaller sliding door on the east, can anything be done to enhance ventilation so frostbite isn't a problem? The west door is full-size. The sliding door on the east is about 30" high and 3 feet across, made of chip board. It leads into the chicken run and there is a wall of glass and wood halfway up the south side of the run, so that sliding door entry to the coop is somewhat protected from the cold and drafts, unlike the door on the west. The chickens roost on nesting boxes in the northewestern corner of the coop. I have big bags of pine shavings up against the outside of the coop's walls in the areas where the chickens roost, to help insulate them from the cold. My rooster got frost bite last winter, and I've read that the main cause of that is humidity. I do the deep litter method in my coop. One small section of the coop to the north of the sliding door has a small opening covered with chicken wire, so fresh air does come in there. I'm worried my rooster will get frostbite again this year. I'm buying a hygrometer to monitor the humidity in the coop. Is there anything I should or shouldn't be doing to bring down the humidity? Should I not leave any poop in the deep litter? Does it add too much moisture?