Barking!!! Or anything you don't want them to do, really.
You simply get some kind of a can (empty soda can, coffee can, etc) and fill it with some pennies or coins. Whenever they bark, SHAKE it and say "Quiet!" or whatever you want to say... they usually do NOT like the loud noise of the coins shaking and it will distract them from whatever they are barking at and get them to stop. |