10/13/2026
It’s TRAINING TUESDAY!!!!
I am out of town this week but I still want to give you guys some food for thought and this is one of the most COMMON causes I see when it comes to negative behaviors….
Being aware of trigger stacking is vital when you are working with a dog who struggles with stress-related behaviors.
Take a look!
🐕 Trigger Stacking - why your reactive dog “suddenly” explodes… 🧠
One of the biggest misconceptions about reactivity is that dogs react because of one trigger.
In reality, it’s often the last straw after many smaller stressors have accumulated throughout the day. This is known as trigger stacking.
Imagine carrying a bucket of water. Every stressful, exciting or worrying event adds a little more water to that bucket. Eventually, one tiny extra drop causes it to overflow. In fact, you may hear R+ / FF professionals often refer to this as the “emotional bucket”.
That’s exactly what happens inside many reactive dogs.
What counts as a trigger?
A trigger (also called an stressor) isn’t always something negative. Anything that causes emotional or physiological arousal can contribute, including:
🐕 Seeing another dog.
🚴 A cyclist passing.
👶 Children shouting.
🚗 Heavy traffic.
⚡ Thunder or fireworks.
🏠 Visitors arriving.
✂️ A grooming appointment.
🏥 A veterinary visit.
💤 Poor sleep.
🌡️ Hot weather.
😖 Pain or discomfort.
🚶 Walking on a busy pavement.
🎾 Highly exciting games.
🐿️ Constant squirrel watching.
🚪 Delivery drivers knocking at the door.
Each event may seem insignificant on its own, but together they can dramatically lower a dog’s ability to cope.
The stress (emotional) bucket
When dogs experience stress, their bodies release hormones such as adrenaline and cortisol.
These hormones prepare the body for action - a completely normal survival response.
The important part is that they don’t disappear the moment the event ends.
Depending on the intensity of the experience and the individual dog, stress hormones can remain elevated for hours, and after particularly stressful events, recovery may take one to three days (sometimes even longer in chronically stressed dogs).
That means your dog may still be physiologically stressed from yesterday’s events before today’s walk has even begun.
Why this matters for reactive dogs?
This explains why your dog may:
❓Walk past five dogs perfectly one day…
💥…then bark at a dog 100 metres / feet away the next.
It isn’t because they’re being stubborn.
It isn’t because they’ve “forgotten” their training.
It isn’t because they’re trying to dominate anything.
⚠️Their nervous system simply has less capacity left to cope. Sometimes - virtually none.
Every trigger brings them closer to their emotional threshold.
Once that threshold is crossed, the brain shifts into survival mode, making calm thinking and learning much harder.
What should we do instead?
Rather than focusing only on the reaction itself, ask:
✔️ What happened earlier today?
✔️ How did yesterday go?
✔️ Has my dog had enough quality sleep?
✔️ Are they in pain or uncomfortable?
✔️ Have they had enough opportunities to decompress?
✔️ Have they experienced several stressful or exciting events recently?
Understanding the whole picture is often far more valuable than analysing the final reaction in isolation.
Helping reduce trigger stacking
💙 Prioritise rest and uninterrupted sleep.
🌿 Allow regular decompression walks in quiet environments.
👃 Encourage natural enrichment such as sniffing and foraging.
📏 Give your dog enough distance from known triggers.
⏸️ Don’t feel guilty about taking a day off from busy walks after a stressful event.
🩺 Rule out pain or underlying medical conditions with your veterinarian.
🎯 Keep training sessions short, positive and below your dog’s threshold.
Sometimes the most productive training session is recognising that your dog has already had enough for the day.
Remember…
Reactive behaviour is often the visible symptom of an overloaded nervous system 👉 not a sign of a “bad” dog.
By understanding trigger stacking, we stop asking:
❌ “Why did my dog suddenly react?”
And start asking:
✅ “How full was my dog’s stress bucket before this happened?”
That simple shift in perspective can completely change how we support our dogs, making training more compassionate, more effective, and far less frustrating - for both ends of the lead. ❤️
