Dog body language
Signs your dog is over threshold
Threshold is the line between a dog who is aware of something and a dog who is consumed by it. Below it, your dog can notice a trigger and still take a treat. Above it, the treat might as well be invisible. Below, how to spot the crossing, what to do on the spot, and why repeated crossings call for help.
Last reviewed October 4, 2026
Reading the line
The signs your dog can no longer take in information.
Food is the quickest test. A dog who normally snaps up a treat but now ignores it, or grabs it hard and spits it out, is often past the point of learning. Hearing goes next: the name your dog answers all day suddenly gets nothing. The eyes lock on the trigger, the body leans in, and blinking seems to stop. You are no longer part of the conversation.
Other signs pile on. Some dogs pant hard, shed suddenly, scan wildly, or spin and leap at the end of the leash. Others go the opposite way, shutting down and refusing to move. No single cue proves it, since a dog might skip a treat simply because it is full. Look for several signs together, in a situation that tends to stress this particular dog.
- Turns down favourite treats
- Ignores name and cues
- Fixed stare, leaning in
- Frantic or shut down
Getting back under
Distance first, training later.
Do not ask for sits or try to train through it. A dog over threshold cannot learn the lesson, and repeating cues mostly teaches it to tune you out. Hold the leash securely, turn, and calmly add distance until your dog can sniff the ground or take food again. Moving away from the trigger, or switching it off, is fine. Skip physical corrections and never punish a growl.
Repeated crossings are information. If your dog goes over threshold on walks, at the window, or whenever guests arrive, plan routes and routines that keep it under the line, and get a professional assessment. Pain can lower a dog's tolerance too, so involve your vet if the change is new. Behaviour Rehab works on reactivity at your dog's pace, and the consultation will point to a lighter option where one fits.
Asked and answered
The questions people ask us.
What does under threshold mean in dog training?
It means your dog can notice a trigger and still eat, respond to its name and move loosely. That is the zone where learning can happen.
Why won't my dog take treats on walks?
Turning down food outside often means stress or arousal is too high. It can also be a full or upset stomach, so look at the whole picture and ask your vet if appetite changes in general.
Can a dog be over threshold without barking?
Yes. Some dogs freeze, stare silently or shut down entirely. Quiet does not always mean calm.
How do I calm my dog down when it's over threshold?
Add distance from the trigger first and give your dog time to settle. Sniffing, taking food again and a softer body are signs it is coming back down.
Keep reading
Keep your dog under threshold
If your dog keeps tipping over the line, book a consultation and we will help you map triggers and next steps.
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