In normal times, you must consciously stop your dog's bad actions. You can use the No command, such as refusing to eat, stopping anything you shouldn't do, etc. Such a no-no is important when things get too noisy. When your dog barks, tease him with his favorite toy or treat. Most dogs will immediately run to grab it. If it really keeps barking, you can also use a water gun to nourish it. For small dogs and cats, this method can be regarded as tried and tested, but you must dry it in time.