The Boy who cried Wolf

I have always enjoyed this fable. I know it is not (quite) a fairy tale but it does have a moral. The Boy who cried Wolf's sole moral is not to lie, because if you do then people will not believe you when you are actually telling the truth. Chicken Little, Big Fat Liar and even an episode of the Simpsons called Marge gets a job are all loosely based on The Boy who cried Wolf. I want to see if I can take the Shepard boy's lying to another level, maybe have him turn into a werewolf or something...