Why write another reference text on internal medicine? Simply, we wanted to provide the reader with a quick reference to find the essentials of canine internal medicine. These are the same topics and facts that are discussed during rounds and that appear on examinations, including board examinations. This book, which we hope is a useful learning tool for students, will also be a vital reference for the practicing clinician. The book contains a great deal of clinical information that can be applied on a daily basis. It is not meant to replace the detail provided in reference textbooks. Our authors have worked to distill the essence of what the.