The two most common purposes for a dog whistle are to recall or stop negative behavior. In the case of negative behaviors, they are commonly used to gain the attention of your puppy. Once your dog stops its behavior and focuses on you, wait for a few seconds before giving him positive reinforcements. This will create a mental link between stopping certain behaviors and getting a reward. It would help if you started with a treat and verbal praise as positive reinforcements. If your dog loves a certain toy, you can use that toy instead of treats. You should find plenty of toys if you look up “pet stores near me” on Google.