Romy M. Heilmann, Dr. med. vet., PhD, DACVIM-SAIM, DECVIM-CA, MANZCVS, AGAF, Professor and Chair of Small Animal Internal Medicine, University of Leipzig, Germany; Romy Heilmann serves as Professor of Internal Medicine at the University of Leipzig, Germany, and as chair of the InnLab working group of the German Veterinary Medical Society (DVG). She leads and participates in several clinical and basic science projects in the fields of small animal gastroenterology, hepatology, immunopathology, and translational medicine.Jonathan A. Lidbury, BVMS, PhD, MRCVS, DACVIM, DECVIM-CA, Associate Professor of Small Animal Internal Medicine and Director of Clinical Services, Gastrointestinal Laboratory at Texas A&M University; Rob and Roxann Bilger Chair in Feline Hepatology; Jonathan Lidbury serves as an Associate Professor in the Department of Veterinary Small Animal Clinical Sciences at Texas A&M University. He is interested in all areas of small animal gastroenterology and is working to develop new non-invasive tests for liver disease in cats and dogs.Jörg M. Steiner, Dr. med. vet., PhD, DACVIM-SAIM, DECVIM-CA, AGAF, Professor of Small Animal Internal Medicine and Director of the Gastrointestinal Laboratory at Texas A&M University; Dr. Mark Morris Chair in Small Animal Gastroenterology and Nutrition; Jörg Steiner received the AVMA Career Achievement Award in Canine Research in 2018. He was selected as a University Distinguished Professor at Texas A&M University in 2019 and as a Regents Professor of the Texas A&M University System in 2021.

• EditorsAuthorsAbbreviationsPrefacePart I: Diagnosis of gastrointestinal disorders1. Diagnostic tools2. Clinical evaluation of dogs and cats with specific clinical signsPart II: Clinical nutrition3. Nutritional management of gastrointestinal diseasesPart III: Diseases of the gastrointestinal tract4. Oral cavity5. Esophagus6. Stomach7. Small intestine8. Large intestine and anorectum9. Liver and biliary tract10. Exocrine pancreas11. Diseases that affect more than one organ of the gastrointestinal tractAppendix