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Behaviour problems

Lead Reactivity: Helping a Dog Who Barks and Lunges on Walks

Why some dogs react to other dogs or people on the lead, and a calm, reward-based plan to improve it.

By Dr Hana LindqvistVeterinary review: Dr Elena Marsh7 min readPublished 2026-09-29Updated 2026-09-29
Illustration of a person rewarding an attentive dog with a treat and clicker

What reactivity is

Barking, lunging or growling on the lead is usually driven by fear or frustration, not dominance. Punishment can suppress warning signs and make the underlying fear worse.

Rule out pain

Pain can make dogs more reactive. A vet check is a sensible first step, especially if the behaviour appeared suddenly.

Work below threshold

Find the distance at which your dog notices the trigger but can still take food. Practise there.

  • Dog sees the trigger — you give a treat
  • Trigger leaves — treats stop
  • Repeat until your dog looks back at you when a trigger appears
  • Reduce distance gradually over many sessions

Management

Walk at quieter times, use a well-fitted harness, cross the road or turn away early, and give your dog days off to lower stress.

Get help

A qualified behaviourist, for example one accredited by the ABTC, can build a plan for your dog. Seek help quickly if there is any risk of a bite.

References

  1. Position statement on humane dog training — AVSAB
  2. Find a practitioner — Animal Behaviour and Training Council (ABTC)