Prince Charming had this. He started it in the vet's office when being checked for his first visit. The vet told me to NEVER use a collar for anything on him as it would only make it worse. He showed me the harnesses he preferred and I went to Petsmart and found one for extra small dogs. He used it for 16.5 years. Wore it to the bridge
when his Uncle Jim buried him in his special box (made by Uncle Jim too).