A seminal exploration of animal emotion, sentience, and cognition, revised and expanded to incorporate a surge of new science When award-winning scientist Marc Bekoff penned the first edition of this book in 2007, he predicted that over time our understanding of animal cognition and emotion would grow “richer, more accurate, and possibly different.” Since then, not only has the field seen an explosion of new and startling research, but the popular interest in the subject has