Factors influencing the expression of behavior in the domestic dog

Domestic dogs differ enormously in both their morphology and behavior. Numerous factors can influence the development and expression of canine behavior and, more generally, determine the success of the pet–owner relationship. This chapter considers the role of nature and nurture in shaping canine behavior. The influence of factors intrinsic to the animal is outlined, focusing on research that has explored the role of breed, sex, and cerebral lateralization in guiding canine behavior and cognitive functioning. The chapter goes on to consider the role of more extrinsic factors that can influence the development of dog behavior, discussing the contribution of early experience, source of acquisition, training techniques, and owner-related traits including personality and attachment style. The article points to the enormous amount of individual variation that exists between dogs and the myriad of factors that can work together to shape the behavior and functioning of the animal we see before us.