What should you do if your dog keeps chewing her harness?

First of all check the dog harness is correctly fitted, you should be able to get one finger comfortably under each side strap or two under the belly strap. Many dogs chew out of discomfort. Check the harness is not chafing your dog either side of the front legs - this can be caused either by a poor fit, too loose or too tight or a rough lining. If you need to replace your dog harness, consider a soft, comfortable fleece dog harness for your dog, as when correctly fitted these cannot chafe or irritate.