If the dog has been with the old owner for a long time, it may be the old owner. The dog will have a certain relaxation period after changing owners. During this period, the new owner should pay more attention to the dog, in addition to the diet. In addition to preparing the food your dog likes to eat, you should spend more time with your dog in life. You can buy some toys to play with your dog, thereby deepening the relationship between you and your dog.