The reason why dogs keep barking in the cage is because they are not used to life in the cage, miss their owners, are bored, or have high energy. First, you should let the dog out to play during the day to let the dog release its energy, and then Prepare a kennel, dog food and water bowl for the dog in the cage, and let the dog move around the cage, but do not close the cage first to avoid the dog being afraid of the cage. After the dog adapts to the cage, he can sleep In the cage.