Cow-calf producers have the option of preconditioning calves at weaning to improve health status and ultimately add value to their calf crop. Preconditioning programs can vary greatly from one operation to another but share the common goal of preparing calves for the next phase of production. The preconditioning period is typically a minimum of 45 days and includes a nutritional program, health protocol, and series of management strategies designed to minimize stress and boost the immune system of the newly weaned calf.