How can I use a dog whistle to stop my dog from barking excessively?

To use a dog whistle to stop your dog from barking excessively, start by blowing the whistle when your dog barks. The high-pitched sound may startle your dog and interrupt their barking. Consistently use the whistle whenever your dog barks excessively to associate the sound with the behavior. Over time, your dog may learn to stop barking when they hear the whistle. Remember to reward your dog for quiet behavior to reinforce the training.