Variation in aggressive behaviour between colour morphs in English cocker spaniel and its consequences for human-dog relationship

aggressive behaviour angleterre animal de compagnie animal health animal training animal welfare bienestar animal chien color colour communication animale communication between animals comportamiento agresivo comportamiento humano comportement agressif comportement humain couleur cuidado en animales de compania dogs doma dressage des animaux england genetic variation human behaviour inglaterra noruega norway perro pet animals pet care sanidad animal sex sexe sexo soin aux animaux de compagnie