Scent Detection

Trigger Stacking: The Night My Perfect Dog Turned Into A Lunatic

Wed, 17 Jun 2026 14:24:42 GMT

The Week That Broke Dozer in 2024

Last night my lovely, sweet, well-mannered Dozer briefly transformed into a complete hooligan.

Not just a little bit naughty. I'm talking full-on barking, lunging, "WHO THE HELL IS THAT?" behaviour at another dog in a pub. If you know Dozer, you'll know this is completely out of character. He's not a reactive dog. He's generally the sort of dog who is far more interested in where his ball is than what everyone else is doing. Yet there we were, sitting quietly in a pub waiting for our food when another dog walked past. Normally, no problem. This time? Dozer launched himself forward, barking loudly enough to make half the room jump out of their skin. The barking continued, we removed him from the room and took him outside to calm down. As behaviourists and trainers, we spend our lives helping people understand their dogs. Sometimes our own dogs remind us that they're still dogs. The answer wasn't training. The answer wasn't obedience. The answer was trigger stacking.

When people see a reaction, they often focus on the final event. The dog barked at another dog. The dog reacted to a stranger.

The dog lunged at a cyclist. But the final trigger is often just the last straw. Think of stress like filling a bucket. The barking wasn't the problem. The overflowing bucket was. Let's look at Dozer's week. Five days earlier we were still in Waxham staying in our caravan. Thomas, one of Dozer's favourite humans, had gone home. Every walk afterwards involved Dozer searching for him.

Then we had lunch somewhere and another dog spent the entire time staring at him from the next table. Not ideal. That night we had thunderstorms. Then more thunderstorms. When you're living in a caravan, thunder sounds considerably less impressive and generally a a great deal louder. The following morning 30mph winds started tearing our awning away from the caravan.

Cue frantic packing, flapping fabric, flying equipment, crashing poles and general chaos. While trying to sort everything out, I managed to trap my finger in a folding table. Not my finest moment. There was blood everywhere. Dozer became visibly distressed and started trying to climb me (flirt behaviour) after investigating the injury. Then came another storm overnight.

The following day involved a five-hour drive through dreadful weather to Southampton. Arriving late, we checked into a hotel.

A hotel Dozer had never stayed in before. New smells. New sounds. New people. Doors opening and closing. Voices in corridors.

Lifts. Trolleys. General hotel weirdness. He spent much of the night pacing and grumbling at every little noise. By the time we arrived at that pub, his stress bucket was already overflowing. The other dog wasn't the problem. The other dog was simply the final piece of Buckaroo.

What Is Trigger Stacking?

Trigger stacking occurs when multiple stressors build up over time until a dog struggles to cope.

Stress doesn't only come from scary situations.

It can come from:

Changes in routine
Travel
Lack of sleep
Loud noises
New environments
Excitement
Frustration
Social pressure
Pain or discomfort
Uncertainty

Every one of these experiences adds a little more weight to the dog's emotional load. Most dogs cope perfectly well with one or two stressors. Problems occur when they arrive one after another without enough recovery time in between. Eventually something relatively minor triggers a reaction that appears completely disproportionate to the situation. Owners often say:

"He just reacted out of nowhere." In reality, it was rarely out of nowhere. We just didn't see all the straws being added to the camel's back.

What's Happening Inside The Dog?

When dogs experience stress, the body releases hormones including adrenaline and cortisol. These chemicals are incredibly useful. They prepare the body to deal with challenges and threats. The problem is they don't disappear immediately. Research suggests cortisol levels can remain elevated for several hours and, in some cases, significantly longer depending on the individual dog and the nature of the stressor. If stressful events keep arriving before recovery occurs, the dog starts each new experience with a partially filled stress bucket. Eventually coping mechanisms fail. The result is often barking, lunging, vocalising, hypervigilance, inability to settle or emotional outbursts that seem completely out of proportion to the situation.

Why This Matters

The danger isn't the one-off reaction. The danger is what happens next. From Dozer's perspective, barking and lunging made the other dog go away. Of course, we removed him from the situation because that's exactly what we should have done. But if we repeatedly allow dogs to reach the point where they feel they need to react, we risk them learning that barking and lunging works.

Not because they're trying to dominate anything. Not because they're being stubborn. Simply because the behaviour achieved the outcome they wanted. Distance. Relief. Safety. This is where many reactive behaviour patterns begin.

What Happens Next?

Once we're home, Dozer gets a few days of being a normal dog. No training plan. No pub visits. No challenges. No life lessons.

Just rest, sleep, sniffing, routine and recovery. Then we'll gradually reintroduce the environments he struggled with. Not because I'm worried he's suddenly become reactive. But because I don't want one difficult evening to become a habit. The goal isn't to avoid the world. The goal is to make sure he has enough emotional capacity to cope with it.

The Takeaway

Sometimes our dogs aren't giving us a training problem. They're giving us an emotional wellbeing problem. Not every reaction is caused by poor training. Not every outburst needs correcting.

Sometimes the kindest thing we can do is step back and ask:

"Has my dog simply had too much this week?"

Looking back, Dozer wasn't being difficult.

He wasn't being naughty.

He wasn't being reactive.

He was tired, overwhelmed and running on an empty emotional battery.

And if I'm honest, after the week we'd had... So was I.

References

Beerda, B., Schilder, M.B.H., van Hooff, J.A.R.A.M. & de Vries, H.W. (1997). Manifestations of chronic and acute stress in dogs. Applied Animal Behaviour Science.
Horwitz, D. & Mills, D. (2009). BSAVA Manual of Canine and Feline Behavioural Medicine.
Overall, K.L. (2013). Manual of Clinical Behavioral Medicine for Dogs and Cats.
McPeake, K., Collins, L. & Zulch, H. (2019). Understanding canine stress and welfare. Companion Animal.
Rooney, N.J. & Cowan, S. (2011). Training methods and d og welfare. Journal of Veterinary Behavior.

Humidity, Heat, Barometric Pressure and Other Things That Ruin a Perfectly Good Trail

Wed, 17 Jun 2026 14:00:02 GMT

If you've ever stood at the start of a trail thinking "This should be easy" and then watched your dog charge off with absolute confidence in what appears to be entirely the wrong direction, congratulations...

You've just met the environment.

One of the biggest misconceptions in trailing is that scent politely sits where the trail layer walked, waiting for the dog to come along and follow it.

It doesn't.

Scent moves. It lifts, sinks, spreads, sticks, drifts, pools, evaporates and occasionally behaves like it has a personal grudge against handlers.

Weather and ground conditions have a huge influence on what your dog is actually working. Understanding them can save a lot of frustration, a lot of second guessing, and quite a lot of colourful language.

First Things First, What Is Scent?

Human scent isn't one thing.

What your dog is actually detecting is a combination of:

Skin rafts and cellular debris
Volatile organic compounds produced by the body
Disturbed vegetation and ground
Micro scent deposited on surfaces

In other words, dogs aren't following a neat little line on the floor.

They're working a constantly changing scent picture that's being influenced by temperature, moisture, airflow and pressure.

Think less pencil line.

Think more drifting cloud with attitude.

Humidity, Scent's Best Friend (Usually)

Humidity is simply the amount of moisture in the air.

From a scenting perspective, moisture is generally helpful because it slows evaporation and helps odour remain available for longer.

High Humidity

When humidity is high:

Scent tends to persist longer
Odour is often stronger
Trails can remain viable for longer periods
Dogs often work with greater confidence

Many handlers describe these as the days when their dogs seem almost effortless.

They're not suddenly geniuses.

The scent picture is simply clearer.

Low Humidity

When humidity drops:

Scent dries out faster
Odour evaporates more quickly
Trails age faster than expected
Dogs may struggle to maintain a consistent picture

That crisp, beautiful winter morning that humans love?

Your dog may disagree.

Dry air is essentially a giant scent thief.

Heat, Where Scent Goes to Cause Problems

Temperature affects scent in two major ways:

Evaporation
Air movement

Warm and Hot Conditions

As temperatures rise:

Scent evaporates more quickly
Odour lifts away from the surface
Thermal currents develop
Dogs may rely more on air scenting

As the ground heats up, warm air rises.

And guess what goes with it?

The scent.

This is why dogs often appear to be trailing with their heads up in warmer weather.

They're not being lazy.

They're not being dramatic.

The scent has literally left the ground.

Cool Conditions

Cooler temperatures generally:

Slow evaporation
Help scent remain closer to the surface
Create a more stable scent picture

That cool, overcast day where everyone is comfortable?

Those are often some of the nicest trailing conditions you'll get.

Barometric Pressure, The Invisible Nuisance

Barometric pressure is simply the weight of the air above us.

You don't need to become a weather forecaster, but a basic understanding can explain a lot of odd trailing days.

High Pressure

High pressure tends to create:

More stable air
Less vertical movement
Scent that settles and spreads

Trails can become wider and more diffuse.

Low Pressure

Low pressure often brings:

More atmospheric instability
Increased vertical air movement
Greater scent dispersal

The scent picture becomes less predictable and more dynamic.

Many handlers report their dogs seeming "off" before a weather change.

That's not your imagination.

Dogs can detect changes in atmospheric pressure far better than we can, and the scent picture may already be changing before the rain arrives.

Wind, The One Everyone Knows About and Still Underestimates

Every trailing workshop eventually includes somebody saying:

"But the wind's coming from over there..."

As if that settles the matter.

Unfortunately, scent didn't get the memo.

Light, Steady Wind

Often creates predictable drift patterns.

Gusty or Variable Wind

Creates:

Scent pockets
Voids
Eddies
Backflow
Pooling

Buildings, hedges, trees, parked vehicles and terrain all influence airflow.

Wind doesn't simply push scent in one direction like an arrow on a weather map.

It twists it, bends it, traps it and occasionally sends it somewhere completely ridiculous.

This is why dogs often cast, check and re-check areas that look entirely wrong to us.

They're working information we can't see.

The Ground Matters Too

The surface your trail crosses has a massive impact on scent behaviour.

Grass and Vegetation

Generally:

Retain moisture
Hold scent well
Create strong scent pictures

Soil

Can retain scent effectively, especially when moisture levels are good.

Gravel

Allows scent to disperse and fall between gaps.

Tarmac

Heats quickly and encourages scent lift.

This is why some dogs appear brilliant in one environment and suddenly less confident in another.

The scent picture has changed, not the dog.

And Then We Add Rain...

Because apparently life wasn't complicated enough already.

Light Rain

Often helps preserve scent by increasing moisture levels.

Heavy Rain

Can physically move scent.

Water carries odour downhill, into drains, verges and low points.

If your dog suddenly starts working several metres away from where the trail layer actually walked, don't panic.

Gravity remains undefeated.

So What Does This Mean for Your Training?

Understanding environmental conditions helps you:

Set realistic expectations
Read your dog more accurately
Avoid unfairly blaming motivation or handling
Design better training setups
Develop more confidence in what your dog is telling you

Most importantly, it explains why no two trails are ever the same.

You can run the same trail, in the same place, with the same dog and the same trail layer.

It will still be different.

Because the environment rewrites the rules every single time.

The Big Takeaway

Trailing isn't about following perfect lines on a map.

It's about interpreting a living, changing scent picture that's constantly being influenced by humidity, heat, pressure, airflow and terrain.

Your dog isn't trying to annoy you.

They're being honest.

Sometimes the scent is exactly where you expect it to be.

Sometimes it's three metres away, floating through a hedge and collecting behind a parked car for reasons known only to physics.

Remember:

Moisture helps scent survive
Heat lifts scent
Pressure changes affect scent stability
Wind creates complexity, not direction arrows
Ground conditions matter more than most handlers realise

If trailing feels messy at times, that's because it is.

The science explains the chaos.

Meanwhile your dog is performing advanced environmental analysis with nothing but their nose, while you're still trying to remember where you left the start article.

So next time a trail goes spectacularly sideways...

Blame the weather first.

It's usually guilty.

Manipulating Puppy the Psychology behind it!

Mon, 15 Jun 2026 07:55:40 GMT

Is Your Puppy Manipulating You? What Child Psychology Taught Me About Raising Confident Dogs

"Just ignore him."

"He's manipulating you."

"Leave him to cry it out."

"He needs to learn."

If you've owned a puppy for more than five minutes, you've probably heard at least one of those.

A puppy cries in a crate.

A puppy follows you from room to room.

A puppy struggles when left alone.

A puppy seeks reassurance when faced with something scary.

And somewhere, usually on social media, someone insists the puppy is manipulating you. Like a sentient being that's only been on the planet a few weeks has the capacity to plan world domination!

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A 3am Rabbit Hole: What Dogs Might Actually Be Smelling

Sat, 06 Jun 2026 09:26:51 GMT

Odour Objects and Scent Detection: What the Research Might Mean for Our Training

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Lets talk PUPPY

Sat, 06 Jun 2026 08:27:42 GMT

Puppy Tip of the Month

Remember that socialisation is not about meeting as many people and dogs as possible. Good socialisation is about helping your puppy feel safe, confident, and relaxed in different environments. Take time to sit and watch the world go by, reward calm behaviour, and let your puppy explore at their own pace. Confidence grows from positive experiences, not from being overwhelmed.

Summer Safety Tip

Sat, 06 Jun 2026 08:27:42 GMT

Summer Safety Tip

If the pavement feels hot to the back of your hand for five seconds, it's too hot for your dog's paws. During warmer weather, walk early in the morning or later in the evening, carry plenty of fresh water, and remember that mental enrichment such as scent games, training sessions, and puzzle activities can be just as tiring as a long walk. Sometimes the best summer exercise happens in the shade.

Frozen Banana & Peanut Butter Dog Treat

Sat, 06 Jun 2026 08:27:42 GMT

Easy dog Treats

A simple summer treat your dog will love. Mash one ripe banana and mix with two tablespoons of dog-safe peanut butter (make sure it contains no xylitol). Spoon into ice cube trays or silicone moulds and freeze for a few hours. These make a great cooling treat on warm days and are perfect for stuffing into enrichment toys for a longer-lasting challenge.

Scent Detection

Trigger Stacking: The Night My Perfect Dog Turned Into A Lunatic

The Week That Broke Dozer in 2024 ﻿

What Is Trigger Stacking?

What's Happening Inside The Dog?

Why This Matters

What Happens Next?

The Takeaway

References

Humidity, Heat, Barometric Pressure and Other Things That Ruin a Perfectly Good Trail

If you've ever stood at the start of a trail thinking "This should be easy" and then watched your dog charge off with absolute confidence in what appears to be entirely the wrong direction, congratulations...

Manipulating Puppy the Psychology behind it!

Is Your Puppy Manipulating You? What Child Psychology Taught Me About Raising Confident Dogs

A 3am Rabbit Hole: What Dogs Might Actually Be Smelling

Odour Objects and Scent Detection: What the Research Might Mean for Our Training

Lets talk PUPPY

Summer Safety Tip

Frozen Banana & Peanut Butter Dog Treat

The Week That Broke Dozer in 2024