Greg Mattson, right, and his son, Jacob, feature two finishers in their Northwest Iowa hog operation. The Mattsons use fans in the double- curtained buildings, as well as a misting system to keep pigs ...

WAUSAU, Wis. (WSAW) - The Wisconsin Valley Fair has many attractions and including animal judging. On days when it’s hot and humid, like Thursday, keeping the animals cool is a top priority. “Pigs don ...