Pennies in a can are very effective for some (although they do nothing for others lol). We just bought the Pet Parade Dog Repeller and WOW it is GREAT. It worked wonders on Bandit (he only barked at one person on a 4 mile walk full of people....hooray) however, it wasn't overly effective for Nala but she responds well to the pennies in a can. The Pet Parade button was so effective I now just need to say SHHH and he won't bark (I can tell when he's getting ready to). Good luck
