It has taken over 16 years of research by the author, Mercedes Colburn, ND, PhD, and consultation with the highly respected Veterinarian, Dr. Dena Eckerdt, to create this remarkable map of the eye of the horse... a map, which can identify the intricate intestinal system of the horse. This involved countless hours of dedication to prove the accuracy of the Equine Grid. The purpose of this book is to educate both experienced and novice horse owners to identify health issues with a non-invasive tool. This book contains eight chapters of color photos showing equine eyes. Plus, you get useful information showing you how to identify markings and zones that reveal existing, or potential, health challenges. This book also includes a copy of the Equine Grid, the invaluable map of the equine eye. This valuable information is not meant to be a substitute for the work performed by veterinarians. Together, however, the iridologist and veterinarian can perform a more inclusive examination of the equine patient.