The scientific evidence on dog training methods is unequivocal: positive reinforcement-based training produces better welfare outcomes and equivalent or better behavioral results compared to aversive methods.
The dog training debate is sometimes presented as a matter of preference, but the scientific evidence strongly favors positive reinforcement methods on both welfare and efficacy grounds. Aversive methods work through the mechanism of pain, fear, or discomfort — they suppress behavior by creating negative associations. Even when they work, they do so at the cost of the dog emotional state and the human-dog relationship. Reward-based training works through the mechanism of learning — dogs actively seek to perform behaviors that produce good outcomes, creating motivation, engagement, and a positive emotional state during training. From a welfare perspective, any method that creates fear or pain as its primary mechanism of behavior change is inferior to one that does not, when both produce equivalent results — and the evidence suggests reward-based methods produce equal or better long-term results. The persistence of aversive methods in professional dog training despite the evidence reflects tradition, economic interests, and marketing rather than the science of animal learning.