What has been learned cannot always be recalled. The frontal lobe, which is responsible for weighing impulses, is one of the last areas of the brain to enter the developed state. Therefore, pubescent dogs find it difficult to resist impulses. This means "being active" in the interest of the young, growing quadruped. His impetuous urge to move must be taken into account; after all, we want to steer his behavior in public into orderly channels and in the process raise him in a manner appropriate to his species to become a member of the "pack association family" who is secure in the hierarchy.