Does Bad Dog mean Bad Owner?You see a guy walking a pit bull with a studded collar. What's your first thought?: tough guy, right? Well, probably. But chances are he's a conscientious, rule-abiding tough guy. So says a study in the journal Anthrozoos. [Vincent Egan and Jason MacKenzie, "Does Personality, Delinquency, or Mating Effort Necessarily Dictate a Preference for an Aggressive Dog?"]