The Vagus Nerve and Calm in Dogs
Updated: 4 days ago
Some dogs bounce back quickly after a scare, and others stay on edge for ages after the doorbell, a passing dog or a loud bang. My collie Sullivan is one of the second kind, a bright, sensitive dog who notices everything. Part of the difference lies in the nervous system, and in particular a long nerve called the vagus nerve, which helps the body shift from "on alert" back to "safe and calm".
THE SHORT ANSWER
The vagus nerve is a major part of the parasympathetic nervous system, the "rest and digest" side that helps the body calm down after stress. It slows the heart, supports digestion and helps breathing settle. How well a dog's body can switch back to calm is often called vagal tone. You can't train the nerve directly, but you can support calm with sniffing, licking and chewing, slow walks, gentle touch your dog enjoys, predictable routines, good sleep and plenty of recovery time after stressful events.
What is the vagus nerve?
The vagus nerve runs from the brainstem down through the neck and chest into the abdomen. It connects the brain with the heart, lungs and gut, and carries messages both ways. It's a big part of the system that helps the body rest, digest and recover.
Calm is a body state, not just a mood
When a dog feels safe, the body follows: heart rate and breathing slow, muscles soften and digestion carries on as normal. When a dog feels threatened, the fight-or-flight system takes over. The vagus nerve helps switch that off again once the threat has passed.
What is vagal tone?
Vagal tone describes how well the body can use the vagus nerve to bring itself back to calm. Dogs who recover quickly after excitement or stress are thought to have good vagal tone. Dogs who stay tense for a long time after the trigger has gone may find that switch harder to flip. Research in this area is still developing, but the idea fits what trainers see every day.
How this shows up in behaviour
A dog who struggles to come back down may:
Pant, pace or whine long after something has happened
Startle easily and stay jumpy
Find it hard to settle or sleep
React more to small things on a stressful day
Struggle to focus in training
Many dogs described as "hyper" or "nervous" are finding it hard to recover from stress, not choosing to misbehave. Read the stress vulnerability model in dogs.
Everyday ways to support calm
Sniffing. Slow, sniffy walks and scatter feeding help lots of dogs settle
Licking and chewing. Lick mats, food toys and long-lasting chews
Slow breathing. A calm, slow-moving person helps; dogs pick up on our pace
Gentle touch. Slow stroking or massage, only if your dog enjoys it and leans in
Predictable routines. Knowing what comes next lowers stress
Sleep. Adult dogs often need 12 to 14 hours a day
Recovery time. After a stressful event, give a quiet day or two
Health matters too
Digestive upsets, pain and poor sleep can all make it harder for a dog to settle. If your dog has ongoing tummy trouble, seems sore, or their behaviour has changed suddenly, speak to your vet first.
RENEE'S TIP
After a stressful walk, scatter a handful of kibble in the garden or on a snuffle mat. Ten minutes of sniffing at home can help your dog come back down far faster than another walk.
QUICK CHECK
ā The vagus nerve helps the body return to calm
ā Some dogs find it harder to switch off after stress
ā Sniffing, licking and chewing help many dogs settle
ā Routines, sleep and recovery days matter
ā See your vet for tummy trouble or sudden changes
ONE-TO-ONE HELP
Help with an anxious or reactive dog
If your dog struggles to settle or stays on edge for hours after a trigger, I can help you build a calmer plan that fits your dog and your home, in an online Dog Behaviour Consultation from wherever you are.
Online on Teams, wherever you are. 30 or 60 minutes.
FAQs
What does the vagus nerve do in dogs?
It's part of the "rest and digest" system. It helps slow the heart, support digestion and bring the body back to calm after stress.
What is vagal tone in dogs?
How well a dog's body can switch back to calm after excitement or stress.
How can I help my dog calm down naturally?
Sniffing, licking and chewing, slow walks, gentle touch they enjoy, predictable routines and plenty of sleep.
Does licking calm dogs down?
Licking a mat or food toy helps many dogs settle. It's worth trying after a busy or stressful time.
Can stomach problems affect my dog's behaviour?
They can. Discomfort makes it harder to settle, so speak to your vet about ongoing tummy trouble.
ABOUT THE AUTHOR
Renee Patience Ā· National Dog Trainer of the Year 2025
Founder and head trainer of Paws Academy, with more than 30 years training dogs and a Level 6 Diploma in Applied Canine Behaviour. Renee has competed in agility, obedience and heelwork to music across the UK, including at Crufts and Olympia, has appeared on CBBC, and is the author of the Modern Training Guides and the Modern Breed Handbook series. Pictured with her boxer, Kookie.
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