This week the American Dressage Legend series continues with a look at the life of 2003 Roemer Foundation/USDF Hall of Fame inductee Margarita Serrell. In our Vet Connection series, Dr. Laura Werner addresses the changes to the USEF Vaccination rule. Listen in… In 2011, Dr. Laura Werner, DVM, MS, DACVS joined Hagyard Equine Medical Institute as a Surgery Associate in the Davidson Surgery Center. Dr. Werner has worked as a FEI Veterinary Delegate at some of the top Three-Day Eventing competitions in the United States.