Training methods have profound welfare implications for dogs. Evidence consistently shows that positive reinforcement produces better learning outcomes and less behavioural suppression than aversive methods.
Training method choice is a welfare decision. Aversive methods including shock collars, choke chains, and physical corrections cause pain, fear, and suppression of behaviour that is misread as compliance. This creates dogs that appear trained but are chronically stressed. Positive reinforcement builds genuine learning through positive associations and produces dogs that are not only better trained but more emotionally stable and safer. The evidence against aversive training from both welfare and efficacy perspectives is clear and growing.