In order to get my dog to stop barking I would try implementing positive reinforcement. In order to do this I would walk over to the dog when he began barking and put a treat up to his nose to smell. Once he smelled the treat (which should cause him to stop barking) I would then reward him with the treat for his quietness, and begin using the word hush at the same time. Finally, I would continue this positive reinforcement each time he barked until he learned to associate that when he hears the word hush he will know to stop