This manual on surgery, gathering 30 clinical cases, provides the reader with a better understanding to perform surgeries in dogs and cats with gastrointestinal disorders. Both simple and complex cases are addressed, detailing patient’s history, physical examination, surgical preparation and technique, as well as additional considerations. It is the intention of the authors of this book to present a series of assorted surgical cases related to the digestive system. Surgical situations of dogs and cats with a more frequent presentation, but because of that none less challenging, will be included. Some less commonly presentations, with their own puzzling demands, will be also addressed.