Animals that get sick cost producers money. Across all areas of production, whether feedlot, cow/calf, backgrounders or weaned calves at sale barns, this is the case. Keeping animals free from disease, breeding back regularly and performing at their optimal potential keeps producers making money. Immunity issues within the animal can be demonstrated in many ways including retained placentas, days open, disease outbreaks and loss of weight. Nutrition plays an important role in maintaining an animal's immune system and keeping them healthy.