haha that sounds familier! Shadow used to do that, she would regular suddenly become lame in one leg, so she would get attention people fawning all over her checking out her paw etc.. then she was magicly all better lol Shadow is onme of the smartest dogs I have ever met you cant fool her lol everything she knows she tought herself, for example she barks at differnt levels loud, quite or inbetween, she starts quiet, then someone says louder so she goes a littler louder, she is told louder again, so she barks louder lol she goes quieter too its funny, nobody ever tought her that, she just does it. she tought herself how to ask to go outside, and to come in, my other dogs just bark and bark and bark, shadow barks once and waits if nobody comes she barks once more a little louder.. she tought herself how to open doors too. my BCs dont dare fake lameness though lol if I think they are hurt I stop the game and make them rest in their kennel.. well they cant have that now can they? lol