Abstract: We describe a highly stable oat oil-conjugated linoleic acid isomeric mixture composition as an ingredient in an oral neutraceutical supplement and method of delivery to equine that meets the dietary needs of neonates, immuno-compromised, athletic horses, and geriatrics. The increased activity and/or stress levels exhibited by the above mentioned groups requires 2-4 times the daily digestible energy as well as additional vitamins and minerals. The neutraceutical supplement consists of at least 20% crude fat, which contains at least a 50% oat oil-6% CLA isomeric mixture composition; and which imparts a remarkable stability to the formulation.