This procedure does require general anesthesia. It involves passing a fiberoptic tube down through the oral cavity, into the esophagus and then into the stomach and duodenum or first part of the intestines. This is used primarily for diagnostic purposes to aid in getting a diagnosis via biopsies but can also be used to remove foreign bodies. The animals are admitted in the morning to have the procedure as early as possible enabling them to get back home in the afternoon. During the procedure, the animals are maintained on IV fluids and have their heart rate, respiratory rate, oxygen levels, temperature and blood pressure monitored. Most animals do very well and are home having dinner in the evening while we await biopsy results.