Leash reactivity — barking, lunging, and pulling toward other dogs or people on lead — affects a large proportion of companion dogs and causes stress for both dogs and owners. Understanding the cause guides effective intervention.
Leash reactivity causes genuine distress in affected dogs — the frustration of being unable to investigate or flee from stimuli they are strongly motivated to approach creates chronic emotional dysregulation during walks. Owners who use punishment to suppress the behavior add aversive stimulation to an already highly aroused dog, consistently worsening outcomes. The most effective approach combines management (preventing over-threshold exposures that reinforce reactive behavior) with systematic desensitization at distances where the dog remains calm. Understanding that most reactive dogs are frustrated rather than aggressive reduces the stigma that leads to reduced exercise and socialization, further worsening the condition.