Understanding the neuroscience and behavioral science behind leash reactivity enables more effective, welfare-positive training interventions that address the emotional root of the problem.
The behavioral science of leash reactivity is clear and well-established: reactive dogs are predominantly fearful, not aggressive, and their behavior is a defensive display driven by the combination of fear and leash restraint. This understanding transforms how we should respond — with empathy rather than correction. A dog who is lunging and barking at another dog needs their emotional state improved, not their behavior suppressed through punishment. Counter-conditioning changes the emotional association with triggers, eventually making them predictive of good outcomes rather than fear. This is both more effective and more welfare-positive than suppression approaches, which may reduce the visible behavior while increasing the underlying anxiety.