Cold temperatures are here and winter is quickly approaching. As the temperatures drop, calf barns are closed up and the ventilation rates are turned down. As an industry we do this reflexively, but is it what’s best for the calves? If it’s not ‘drafty,’ can a calf have too much fresh air? Dr. Ryan Leiterman of Crystal Creek tells us more on this month’s A Breath of Fresh Air on Dairy Radio Now: