Dr. Stephen Duren has been appointed as the official nutritionist for the Alltech FEI World Equestrian Games of 2010. Dr. Duren of Performance Horse Nutrition LLC consults extensively on equine nutrition and performance and was the developer of Green Feed – an environmentally acceptable horse nutrition program developed in partnership with Alltech and O. H. Kruse of California.

Dr. Duren has earned his M.S. and Ph.D. degrees in nutrition and exercise physiology from the University of Kentucky and practices with Dr. Tania Cupitt providing services to horse owners, breeders, feed manufacturers and veterinarians.