20/05/2026
Your dog is not being dramatic. They are over threshold.
You have probably heard the word “threshold” if you have spent any time in the reactive dog world. But what does it actually mean, and why does it matter so much?
Think of your dog’s nervous system like a glass.
Every stressor they encounter - a dog in the distance, a loud noise, a strange person, even a disrupted sleep or a missed meal - adds water to that glass.
Threshold is the point just before it overflows.
Under threshold = your dog can see, hear or smell a trigger and still function. They might notice it. They might feel uncomfortable. But they are still able to think, take treats, respond to you.
Over threshold = the glass has overflowed. Your dog is in full stress response. Barking, lunging, spinning, shutting down. At this point, no learning is happening. They are just surviving.
If this resonates, save this post - it’s worth coming back to.
Most owners, without realising it, are walking their dogs over threshold every single day.
They are not doing anything wrong. They are trying to socialise, to exercise, to get on with life. But what the dog is experiencing on those walks is not exposure that helps - it is stress that compounds.
Over time, that pattern makes reactivity worse, not better. The nervous system stays primed. The triggers feel more threatening. The responses get faster and bigger.
Behaviour modification works by keeping your dog consistently under threshold while they encounter triggers - at whatever distance or intensity makes that possible.
That might mean starting much further away than feels necessary. It might mean fewer walks, shorter routes, or completely different environments for a while. It is not giving up. It is giving your dog’s nervous system a chance to reset and learn something new.
If your dog is going over threshold on every walk, the answer is not more exposure.
It is a plan that actually accounts for where their threshold is right now - and builds from there.
That is exactly what we work on together.
If you are not sure where your dog’s threshold is right now, that is exactly the kind of thing we figure out together.
Where does your dog tend to go over threshold? On walks, in the garden, in the car? Let me know in the comments - I read every one.