There is a training collar that they have for dogs to make them stop barking. When the dog barks a spray is emitted from it. It is very unpleasant to the dog (not harmful) and the dog will hate it and learn not to bark. It works wonders, I have seen so many people use it with their dogs after they had tried everything else and now they don't have any barking problems. Its the most humane way and like I said, it works!!!
