Training methodology profoundly affects dog welfare. Evidence consistently shows that positive reinforcement-based training produces better outcomes with fewer welfare costs than punishment-based methods.
Training methodology is a direct welfare determinant. Dogs trained with punishment experience pain and fear as part of their normal interaction with the owner — their learning environment includes regular aversive events. This causes anxiety, stress, and — in cases where punishment triggers defensive aggression — danger. Positive reinforcement training makes learning itself a positive experience: dogs engage eagerly, build confidence, and develop a positive association with the training relationship. The evidence is not ambiguous — positive reinforcement achieves equivalent or better behaviour outcomes with dramatically better welfare. The continued use of punishment-based training is a welfare problem without a scientific justification.