More common in young animals, it is spread through the feces of an animal which has the disease or is a carrier, but may show no signs of illness itself. The primary sign is diarrhea. Several cases show blood in the diarrhea, depression, and weight loss. This most commonly occurs when animals are crowded into small pens or where unsanitary conditions exist. Treatment may be Corid added to the drinking water and all other water sources eliminated.