Veteran riders Karen O'Connor and Phillip Dutton finished in first and third places respectively after the first day of dressage competition at the 2010 Rolex Kentucky Three-Day Event. Twenty-seven of the 53 entries will perform their dressage tests on Friday.

Karen is a three-time Olympian, most recently aboard Mandiba, her mount for this year's Rolex event. Phillip rode two of his four Rolex horses on the first day, claiming the third spot with The Foreman. Both riders are sponsored by Kentucky Equine Research and Pennfield Feeds, a KER Team Member.

Read more about Karen and other Elite Riders sponsored by KER.

Kentucky Equine Research (KER) is an international equine nutrition, research and consultation company serving both the horse owner and the feed industry. Its goal is to advance the industry's knowledge of equine nutrition and exercise physiology and apply this knowledge to produce healthier, more athletic horses.