Dr. Evan Moore has allowed Dr. Ryker's clinic the use of a 3-meter videoendoscopy for the examination of the horses upper gastrointestinal tract.  This includes the throat, esophagus, stomach and the initial portion of the duodenum.  What we will be looking for are basically lesions (ulcers or tears) in the esophagus.  The stomach is also examined for ulcers.  A significant number of racing and competitive horses do suffer from stomach ulcers.  The examination of the stomach requires a 24-hour fast followed by an exam at the clinic.