Dogs have a storied history in health care, and the human-animal relationship has been used in the field for decades. Over the years, certain dogs have improved and advanced the field of health care in myriad ways. In this book, the author presents the stories of these pioneer dogs, from the mercy dogs of World War I, to the medicine-toting sled dogs Togo and Balto, to contemporary therapy dogs. More than the dogs themselves, this book is about the human-animal relationship, and moments in history where that relationship propelled health care forward.