Gastrointestinal disease is one of the most common problems in small animal practice and endoscopy is rapidly becoming a key tool in the investigation of many disorders. Diagnosis is dependent on both the interpretation of the gross endoscopic images and the histopathological interpretation of the endoscopic biopsies. For the first time, both elements of interpretation are brought together in one single volume. This full-colour atlas provides the reader with hundreds of high quality images showing the endoscopic appearance of the normal canine and feline GI tract, the endoscopic appearance of GI lesions, and the histopathological appearance of these lesions. Written and edited by the WSAVA GI Standardisation group, this book will serve as the gold standard reference work for all canine and feline GI endoscopic diagnoses.