When selecting cages, pay attention to the size. If the size of the cage is too small, the dog will be very uncomfortable, but if it is too large, it will make the dog feel insecure, and make the cage from a safe nest into a punishment tool. Facing this problem, many owners who are raising puppies will be very confused. If the size of the dog keeps changing with age, is the cost too high? In fact, many well-known brands of cages will provide freely settable partitions in larger cages to constantly adapt to the growing size of dogs.