This book synthesizes research from behaviour genetics, animal science and veterinary literature in order to bridge the gap between the fields of genetics and behavioural research. The author's objective is to show that principles discovered by behavioural geneticists have practical applications in agricultural and companion animals. The continuing domestication of animals is a genetically complex process whose myriad impacts on animal behaviour are underappreciated. Genetic factors play a substantial role in both species-specific behaviours and differences in behaviour between different individuals in the same species. Leading authorities explore the impact that increased intensities of genetic selection have had on domestic animal behaviour. Rodents, cattle, pigs, sheep, horses, herding, guard dogs, and poultry are all included in these discussions of genetic influences. * Includes four new chapters on dog and fox behavior, pig behavior, the effects of domestication and horse behavior * Synthesizes research from behavioural genetics, animal science, and veterinary literature * Broaches fields of behaviour genetics and behavioural research * Includes practical applications of principles discovered by behavioural genetics researchers * Covers many species ranging from pigs, dogs, foxes, rodents, cattle, horses, and cats