Your dog chews at the strap or wriggles out of the harness while you drive. Do not turn around to fix it in moving traffic or reach back while driving. Pull over safely before checking the dog. If the restraint is damaged, loose, rubbing, or could tangle around your dog, do not use it for the next journey.
Choose a safe travel setup
A seat cover protects upholstery, it is not a restraint. The American Veterinary Medical Association advises using a suitable vehicle safety harness, secured crate or carrier. A travel harness differs from an ordinary walking harness. Look for crash-tested options compatible with your vehicle's seat belt, and follow the maker's fit and installation instructions. The Center for Pet Safety lists products certified under its testing program, but certification of a product is not proof that every size, dog or car setup fits.
A crate or carrier should let your dog stand, turn and lie down comfortably. Secure it so it cannot shift. Check both the dog's fit and the anchor points while parked. Do not attach a tether to a neck collar, leave a loose crate in the car or run a leash across the cabin where it can wrap around the dog. If the restraint cannot protect the dog and keep them from the driver, arrange another safe transport plan with your veterinarian before an essential trip.
Practise only while parked
Let your dog investigate the chosen equipment with the engine off. Reward a voluntary approach, then a brief comfortable fit. Build toward a short time secured while you sit nearby. Look for chewing, hard pulling, panic or rubbing. If your dog struggles, stop and ask your veterinarian about discomfort or travel anxiety and a qualified reward-based trainer about a gradual plan. A planned drive is not the place to discover whether panic will pass.
If your dog may have swallowed strap material, contact your vet for advice rather than assuming it will pass. Vomiting, pain, choking or breathing difficulty needs urgent veterinary attention. Never leave a dog alone in a parked vehicle, even for a short errand.
Common mistakes
Using a normal walking harness as a crash restraint, clipping a travel tether to a collar, relying on a seat cover, or driving with a chewed strap can leave the dog and people unsafe. Test fit and comfort while the car is stationary. If the setup fails, postpone nonessential travel until you have a safe alternative.
Sources: American Veterinary Medical Association, 'Pet safety in vehicles'. Center for Pet Safety, 'CPS Certified'.