My gretta is 5 months old and in a clicker training class. Anyway, the other day the instructor brought out one of those big exercise balls (you know, the ones you can sit on and do sit ups) Anyway, she gave Gretta a weighted one, one which had sand in it due to her size. The job is to get her to push the ball with her nose or body but not to bite it or use her paws. There's something called triball (I know that's not spelled correctly) but it's where you teach dogs, especially herding breeds, to push the balls into a goal. We started by having her touch the ball with her nose, click and reward. After she figured that out we put a few treats under the ball and she pushed the ball off with her nose. We had a good time and she seemed to really like tring to figure out how to get the treats. Don't know if we'll ever get to pushing the ball into a goal, but you know, as smart as shephards are, we have a pretty good chance. Just an idea of something you can do with your beautiful little pup!