Corn toxicity is a disease which is linked to supplemental feeding of deer. It occurs when deer rapidly change their diet to a high grain diet. Ruminants need to change their diet of roughage to grain slowly to give the bacteria in their gut a chance to adjust to changes in feed type. Otherwise, rapid exposure to a concentrated grain diet will often cause a fatal disruption of the body's acid-base balance. Symptoms include diarrhea, bloating, enteritis, frothing at the mouth, weakness, convulsions, circling and tremours. It often results in the rapid death of animals in good physical condition. This disease has occurred in Muskoka as recently as the winter of 2006.