Optimal stud support is formulated to meet the needs of the working stud dog. Fertility is important, throughout a busy demanding season sperm quality can suffer. Creatine monohydrate is included as it provides an integral part of energy previsions in cells. The movement of sperm is dependent on ATP as a source of energy. If creatine monohydrate in involved in energy transfer, the motility of sperm may be improved on supplementation. Creatine I found naturally in the head of sperm and helps to ensure optimum semen viability and metabolic activity.