contains polyphenol oxidase enzyme activity that contributes to improved protein degradability and lipolysis in the gut of ruminants . Orchardgrass is one of the best-adapted forage grasses for the Appalachian region, having high yield potential, good seasonal growth distribution, and excellent nutritive value. Orchardgrass is reported to contain small amounts of polyphenol oxidase which may also impact protein degradability and lipolysis.