It is good for dogs to wear copper bells. For example, it can let people who are afraid of dogs hear it in advance. Although there are many people who raise dogs and like dogs now, there are still people who hate dogs and are afraid of dogs. It still exists that the words of these people after seeing dogs will inevitably make dog owners feel uncomfortable. After putting a bell on the dog, the dog will make a "ding-ding-ding-ding" sound when it walks, which is afraid When dog owners hear the sound of the bell, they will know that a dog is coming and they will avoid it in advance.