Training methods significantly affect animal mental health and welfare. Positive reinforcement-based approaches improve welfare outcomes while achieving equally effective behavioral results.
Training method choice is a welfare issue because the psychological impact extends far beyond training sessions. Dogs and other animals trained with aversive methods — shock collars, choke chains, physical corrections — show elevated fear responses, reduced optimism in cognitive tests, and increased aggression. These welfare costs occur even when aversive methods achieve behavioral compliance. Positive reinforcement training, where desired behaviors are rewarded rather than undesired behaviors punished, achieves equally effective results with measurably better welfare outcomes. The evidence base supporting positive methods is now robust across species including dogs, horses, zoo animals, and marine mammals.