Leash reactivity — excessive barking, lunging, and aggression toward dogs or people while on leash — is one of the most common welfare problems in companion dogs and reflects underlying fear or frustration.
Leash reactivity is fundamentally a welfare problem rooted in emotional distress. Reactive dogs are not being aggressive for dominance or bad temperament — they are frightened, frustrated, or overwhelmed by stimuli they cannot escape or manage normally because the leash removes their behavioral options. The welfare cost is acute: reactive episodes involve intense physiological stress responses that are distressing for the dog. Chronic reactivity that goes unaddressed means repeated stress exposures on every walk. Owner responses that involve punishment — leash corrections, spray bottles, shock collars — create additional fear and worsen the emotional state driving the behavior. The welfare-appropriate response is to address the emotional root through systematic positive counter-conditioning, manage exposure carefully to prevent rehearsal of reactive behavior, and seek professional help from a force-free certified trainer.