Studies have shown that probiotics can minimize the spread of diarrhea outbreaks in daycare settings. Probiotics are organisms in fermented foods that promote good health and establish a healthy balance of intestinal bacteria. Bottle-fed babies can drink the probiotic-fortified formulas; Older babies can get them from certain kinds of yogurt and yogurt drinks, or from baby food. Some doctors recommend probiotic supplements for antibiotic-related diarrhea. Always talk to your doctor, however, before switching formulas or giving supplements.