You know what is way more effective than 'Beware of Dog'? The three-quarters inch metal Hulk Face Dog Collar Charm! Some people are afraid of dogs, other people love them(like you or somebody you know) but everybody knows of Marvel's Incredible Hulk! You wouldn't want to make him angry, so people won't make your dog angry either(I think that's how the transitive property works). Any-who, the Hulk Face Dog Collar Charm is a great addition to any collector's...um...collection! Yeah! Unfortunately, does not come with a ring or string to attach to a collar!