Adjust the tightness of the chest and back straps

The chest strap should not be stuck under the dog's armpit, nor should it affect the movement of the dog's scapula;
After putting on the dog's forelimbs, you can pull up the shoulder strap and adjust the angle of the shoulder strap. Be careful not to get caught in its neck and armpits, as it should be able to protect the dog's chest. The muscles in this area are strong and not too tight. It is also important to ensure that the dog's scapula can move freely.