A dog’s behavior is influenced by its sex and genetic back – ground, the male puppy is masculine from birth because the development of his brain is affected by the sex hormone testosterone which he produces while stilin the womb. Under this hormonal influence he grows bigger, stronger, and more assertive than his female littermates. The female does not experience hormonal influence on behaviors in many canine species, including foxes and wolves. Selective breeding has exaggerated, and the color of a dog’s coat can partly predict its behaviors.
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