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How well do we really know dogs? People may enjoy thinking about them as "man's best friend," but what actually drives the things they do? What is going on in their fur-covered heads as they look at us with their big, expressive eyes? Raymond Coppinger and Mark Feinstein know something about these questions, and with How Dogs Work, they're ready to share; this is their guide to understanding your dog and its behavior. Approaching dogs as a biological species rather than just as pets, Coppinger and Feinstein accessibly synthesize decades of research and field experiments to explain the evolutionary foundations underlying dog behaviors. They examine the central importance of the shape of dogs: how their physical body (including the genes and the brain) affects behavior, how shape interacts with the environment as animals grow, and how all of this has developed over time.