Dog barking is an expression of inner emotions. When a dog barks, it should be a sign that the dog is scared and nervous, or that the dog has been criticized by the owner and feels sorry and aggrieved. At this time The owner should comfort the dog more, play with the dog, and distract the dog's attention. In addition, when dogs enter a new home, they will also make aggrieved noises because they are unfamiliar with the surrounding environment.