Why That Dog Is Doing That Behaviour
A woman sat across from me last week.
Her dog had bitten a child at the park.
Not a serious bite. But a bite.
She had tried three trainers. She had done classes. She had watched videos. She had bought tools.
Nothing had worked.
She looked exhausted. She looked ashamed. She said the words I hear all the time.
“I don’t understand why he does it.”
That sentence is where every behaviour problem actually lives. Not in the behaviour. In the gap between what’s visible and what’s actually happening.
The bite is the last thing that happened. It is not the thing.
Most People Are Looking at the Wrong Thing
When a dog bites, lunges, destroys, guards, or shuts down, most people look at that behaviour and try to stop it.
That makes sense. It is the thing they can see.
But the behaviour is the end of a long chain of events. Everything that produced it happened upstream. Most of it was invisible.
Stopping the behaviour without understanding the chain is like turning off a smoke alarm without looking for the fire.
The alarm stops. The fire keeps burning.
Over years of working with dogs, I have built a way of reading that upstream chain. It uses four lenses at the same time. Each one answers a different question about the dog in front of me.
Together, they answer the one question that matters.
Why is that dog doing that?
Lens One: Who Is This Dog?
This is the first question. Not “what is it doing” but “who is it?”
I use a framework called L.E.G.S. It stands for Learning, Environment, Genetics, and Self.
Learning covers the dog’s history. What has it experienced? What has it been taught? What has it learned to expect from the world?
Environment covers what is around the dog right now. The home. The routine. The relationships. The stressors it lives with every day.
Genetics covers what the dog was built for. A border collie and a basset hound with the same behaviour problem are not the same problem. Their neurological programmes are completely different. Their drives, their thresholds, their instincts — all different.
Self covers the dog’s internal state. Is it sleeping? Is it in pain? Are its hormones affecting its behaviour? Is it young and still developing or older and declining?
These four things together explain the context.
They explain not just why the behaviour happened today. They explain why this dog, in this situation, was always going to produce this behaviour unless something upstream changed.
Lens Two: What Need Is Being Communicated?
Behaviour doesn’t come from nowhere.
It comes from unmet need.
Every behaviour is a message. The dog is telling you something about what is missing or what feels unsafe.
The dog that shreds furniture isn’t being destructive. It has an instinctual need to dissect and consume that has nowhere appropriate to go.
The dog that can’t settle isn’t hyperactive. Its need for genuine calm and rest has never been properly met.
The dog that snaps when handled isn’t aggressive. Its need to feel safe in its own body isn’t being met.
When I look at a behaviour, I’m asking: what need is in deficit right now?
Is it safety? Rest? The ability to express instinctive behaviours? Agency — the experience of having some control over its own life?
Once I know which need is most urgent, the behaviour makes complete sense.
And the intervention becomes obvious.
Lens Three: What Is Keeping It Going?
This is the precision layer.
Even when I understand the context and the unmet need, I still need to know exactly what is maintaining the behaviour in this moment.
Behaviour persists because it works. Something about it is paying off for the dog.
Maybe lunging creates distance from something scary. That’s a payoff.
Maybe barking gets the owner’s attention. That’s a payoff.
Maybe destroying the sofa releases physical tension that has nowhere else to go. That’s a payoff.
The question is: what does the dog get or avoid by doing this?
This is the science of behaviour. Antecedents, behaviours, consequences. What sets it up, what the dog does, what happens next.
Without this lens, you might understand the dog perfectly and still not know how to help it change.
With it, you can design an intervention that makes the unwanted behaviour unnecessary.
Lens Four: Is the Dog Even Ready to Learn?
This is the one most people miss entirely.
Everything else depends on the state of the dog’s nervous system.
A dog in chronic stress cannot process new information well. It cannot generalise what it learns. It cannot regulate its own responses.
A dog operating in a constant state of threat — low-level, invisible, daily — has a nervous system that is permanently primed for danger. That dog is not in a state to be trained. It is in a state to survive.
This is why so many training plans fail.
Not because the training was wrong. Because the dog’s nervous system was not ready to receive it.
Safety and genuine rest have to come first. Without them, nothing else lands properly.
What Happens When You Use All Four
Here is what changes when these four lenses work together.
You stop treating the symptom. You start treating the cause.
The dog that bit the child at the park? Genetics suggested a breed with strong reactive tendencies.
Learning history showed a dog that had been repeatedly overwhelmed in social settings and had learned that escalation created space. Environment revealed no genuine rest, high daily stimulation, and a stress system running at capacity. Nervous system assessment showed a dog with no resilience left.
The bite wasn’t aggression. It was the end of a very long chain.
When you can see the whole chain, you know exactly where to intervene.
You reduce the stress load. You create safety. You give the dog a nervous system that can actually recover. You address the learning history with a plan that builds new associations. You look at what the genetics demand and provide appropriate outlets.
The same protocol that had failed three times in a row, applied after addressing the upstream conditions, starts to work.
That is not magic.
That is the difference between looking at the behaviour and looking at the chain.
Why This Matters for You
You don’t need to be a behaviourist to use this thinking.
You just need to shift the question.
When your dog does something you don’t understand, instead of asking “how do I stop this,” ask: “what chain of events led here?”
What does this dog need that isn’t being met?
What is its nervous system like right now?
Is it safe? Is it rested? Is it getting to be a dog?
The behaviour is a message. It is not the problem.
The upstream chain is the problem.
Once you can read it, everything changes.
