Leash reactivity — lunging, barking, and apparent aggression toward other dogs or people when on leash — is distressing for dogs and owners. Understanding its causes guides effective, welfare-positive management.
Leash reactivity causes significant welfare harm to affected dogs. Every walk becomes a stressful experience as the dog scans for triggers, anticipates threatening encounters, and regularly experiences panic-level arousal responses. The chronic stress of regular reactive episodes elevates baseline anxiety and can cause physical health problems over time. Punishment-based approaches — corrections, choke chains, shock collars — used by some trainers for reactive dogs consistently worsen the underlying emotional state driving the reactivity, creating a more anxious dog rather than a less reactive one. Reward-based desensitization improves the emotional state that drives reactivity, resulting in lasting welfare improvement.