If he had a choke collar or one of those with the inward spikes, he wouldn't have had to pull on the leash so hard. That said, IMO, those collars do far more damage than simply pulling hard on a regular collar attached to a leash. Furthermore, proper training indicates one should be firm while correcting, using a calm but firm voice followed by a treat if the animal does what is expected. Not saying you're wrong, but my dog was trained using a sharp tug on the leash when she wasn't listening, and that was during her training as a service dog. That training still exists today. Yes, my dog listens, is well behaved and does not bark unless commanded to do so....Dennis