Diarrhea, or scours, accounts for over 50% of illnesses in pre-weaned calves, contributing to 32 percent of all deaths in calves (USDA NAHMS 2014 Preweaned Calf Component Survey). Scours itself does not usually kill the calf. Rather, the calf will succumb from the dehydration and electrolyte imbalances that follow. Early identification of affected calves and early and aggressive treatment with fluids and electrolytes is the most successful way to treat scouring calves.