Training method choice has direct welfare implications for companion dogs, with aversive methods including shock collars, prong collars, and punishment-based approaches associated with stress, anxiety, and aggression.
Dog training method choice is a welfare decision with clear evidence pointing in one direction. Aversive training methods including electric shock, prong collars, and punishment work through pain and fear — the animal learns to avoid a behavior to prevent an unpleasant experience. This is welfare-harming as a direct experience, and accumulating evidence links aversive training to longer-term anxiety, reduced trust in human handlers, and increased aggression. Positive reinforcement training achieves equivalent behavioral outcomes through reward and builds a relationship based on positive association rather than fear. The persistence of aversive methods in the face of this evidence reflects cultural inertia and commercial interests in some training sectors.