Reactivity vs Aggression: Know the Difference
If your dog lunges and barks at other dogs on a walk, someone has probably called him aggressive. Maybe you’ve started to believe it yourself.
Most of the time, it isn’t true. And the label matters, because the word you use for the problem decides how you try to fix it.
What reactivity actually is
Reactivity is a dog over-reacting to something in his environment. Another dog, a person, a bike, a car door. The reaction is big and loud, but it isn’t about hurting anyone.
Underneath it is usually one of three things:
- Fear. “That thing is too close and I can’t get away from it.”
- Frustration. “I want to get to that dog and the lead won’t let me.” These are the frustrated greeters, and there are far more of them than people think.
- Over-excitement. Too much arousal, nowhere for it to go.
The lunging and barking is the dog saying “I can’t cope with this, at this distance, right now.” It’s information, not a character flaw.
What aggression is
Aggression is behaviour aimed at making something go away by threatening or causing harm. Stiffening, a hard stare, a growl, a snap, a bite. Some reactive dogs do escalate to this, which is exactly why it’s worth getting help early rather than hoping it passes.
But a dog who goes off at the end of the lead and then calms down the moment the other dog has gone past is, in most cases, not an aggressive dog. He’s a dog who’s been pushed past what he can handle.
Why the difference matters
If you think your dog is aggressive, you tend to manage him like a threat. Tight lead, telling him off, avoiding everything. If you understand he’s reactive, you start asking a much better question: where, and at what distance, does it start?
I ask every owner the same thing. Where does it happen? Corners? Cars? That one street? Owners usually know the answer straight away, and that answer is where the training starts.
Threshold: the word that changes everything
Every reactive dog has a distance at which he can see the trigger and still think. Closer than that, and he’s over threshold. Learning stops.
The easiest way to tell? Offer a treat. A dog who would normally snatch food and suddenly won’t take it isn’t being fussy. He’s telling you he’s too close. Nine dogs in ten over threshold won’t eat.
That’s why so much reactivity training goes wrong. People do the right thing, but a few metres too close or a few seconds too late.
What actually helps
- Distance first. Work where your dog can notice the trigger and stay calm. Then close the gap slowly, over weeks, not minutes.
- Stop the rehearsal. Every lunge your dog practises makes the next one easier. Change routes, times, or sides of the road while you build the skill.
- Reward the calm look, not the meltdown. Your dog sees the trigger, stays settled, gets paid. That’s the whole game.
- Stay calm on your end of the lead. A tight lead tells your dog something is wrong before he’s even seen it.
If the reactivity appeared suddenly in an adult dog who never used to do it, see your vet first. Pain changes behaviour, and no amount of training fixes a sore hip.
You’re not a bad owner
Most owners of reactive dogs feel judged on every walk. Crossing roads, walking at 6am, apologising to strangers. If that’s you, you’re not alone, and your dog isn’t broken.
Reactivity is one of the most fixable problems I see. It takes the right distance, good timing and patience. If you’d like help working out where your dog’s threshold is, book a consultation.
