The shift from aversive to positive reinforcement training methods represents one of the most significant welfare improvements in dog ownership over recent decades.
Aversive training methods cause acute pain and fear that impairs the human-dog bond and increases the risk of aggression. Dogs trained through punishment associate training contexts with threat, reducing their willingness to engage and increasing anxiety. By contrast, positive reinforcement training creates pleasant associations with learning and strengthens the human-dog relationship. The welfare benefits extend beyond training sessions: dogs with positive training experiences show more optimistic emotional responses and lower baseline anxiety. Regulatory moves to ban shock collars are supported by strong welfare evidence.