Dogs not eating may be caused by illness, estrus, hot weather, internal parasites, picky eaters, etc. Treatment should be based on the dog's own situation. First observe the dog's mental state. If the dog is not in good spirits, it may be because he is sick, and he needs to go to the hospital for examination and treatment in time. If the dog is not sick, you can improve the dog’s diet to increase its appetite, and the dog should be dewormed regularly.