Dog Calming Signals: The Science of Yawning, Lip-Licking, and Looking Away

What "calming signals" actually means

The phrase comes from Norwegian ethologist Turid Rugaas, but the underlying behaviors are now mapped systematically by veterinary welfare scientists at institutions like Purdue University. The idea is simple: dogs are conflict-averse social animals. When a situation feels uncomfortable, they prefer to de-escalate. They do that through small, repeatable body-language gestures that calm both themselves and whoever is around them.

This is not anthropomorphic guessing. It is observable behavior tied to measurable physiological markers — cortisol, heart rate variability, sustained attention. The signals are reliable enough that trainers and behaviorists use them as the first line of assessment whenever they meet a new dog.

The core calming-signal vocabulary

Each of these is a stand-alone signal, but they almost never appear alone. A stressed dog will stack two, three, or four within seconds. That stacking — not any single gesture — is what reliably indicates discomfort.

• Lip licking out of context. A quick tongue flick with no food nearby. The most common appeasement signal, and the most commonly missed.
• Yawning when not tired. Often a self-soothing behavior in moments of tension, not boredom.
• Head turn or full body turn. Breaking line of sight is a polite request to lower the social pressure.
• Slow blink or averted gaze. Dogs find direct stares confrontational and will look away to defuse them.
• Paw lift. One front paw held off the ground, often paired with a small posture shift.
• Sniffing the ground unexpectedly. A displacement behavior that buys the dog a moment to disengage.
• Body shake-off when not wet. The full-body shake you see after grooming, used here to reset arousal.

Why these get misread as "guilt"

A dog that lowers its head, averts its eyes, pins its ears back, and licks its lips when the owner comes home and sees a chewed shoe looks, to a human, exactly like an embarrassed child. Decades of cognition research from Alexandra Horowitz at Barnard College's Dog Cognition Lab suggest something simpler and more useful: the dog is reading the owner's body language and tone, predicting an unpleasant outcome, and offering appeasement signals to defuse it. That is not moral guilt — it is social skill. For the umwelt theory behind why this works, see our guide on the dog's perceptual world.

The practical consequence is important. If you "punish" the dog after the fact, you are punishing the appeasement gestures, not the chewing. The dog will produce them more reliably, faster, and in more situations. That is the opposite of what you want.

From signals to action

The point of reading calming signals is not to label your dog. It is to change your own behavior in time. When you see two or more signals stacked within ten seconds, the right move is almost always the same:

1. Stop whatever you were doing that increased the pressure.
2. Move away or turn sideways rather than face the dog head-on.
3. Lower your voice and avoid direct eye contact.
4. Wait. Give the dog 3–5 minutes to choose whether to re-engage.

If the signals persist or escalate to a hard stare, stiff body, closed mouth, or growling, the situation has moved past calming signals into clear warning territory. That is no longer a "give it a minute" moment — that is a "stop and seek professional guidance" moment.

What are canine calming signals?

Canine calming signals are the small, repeatable body-language gestures dogs use to de-escalate tension — to calm themselves and to ask the dog, person, or situation in front of them to lower the pressure. The term was coined by Norwegian dog trainer and ethologist Turid Rugaas, who catalogued roughly thirty distinct signals after years of observing dogs in conflict and greeting situations. The core insight behind the phrase is that dogs are conflict-averse: given the choice, a dog would far rather defuse a tense moment with a yawn or a head turn than bark, snap, or fight. When you learn to read canine calming signals, you are learning to catch the conversation while it is still polite — long before it ever becomes a growl.

Turid Rugaas's calming signals: the fuller list

Rugaas's original catalogue is far longer than the handful most owners know. While the exact count varies by how you group them, her work describes around thirty signals. Knowing the broader list matters because dogs stack and substitute these gestures — a dog that can't turn its head away may sniff the ground instead, and a dog that can't leave may lick its lips and yawn in rapid succession. The most frequently observed signals include:

• Head turn — brief or sustained, away from the trigger
• Turning the whole body sideways or away
• Looking away or softening the eyes
• Nose or lip licking out of context
• Yawning when not tired
• Sniffing the ground suddenly
• Walking in a slow or curving arc rather than straight at another dog
• Freezing or moving in slow motion
• Sitting or lying down to defuse pressure
• Play bow used to break tension, not just to invite play
• Lifting one front paw
• Blinking softly or narrowing the eyes
• Licking another dog's or person's face (appeasement)
• Shaking off as if wet to reset arousal

A few of these overlap with more intense stress cues — a fixed, averted stare can tip over into dog whale eye, which is no longer a polite request but an early warning.

How many calming signals do dogs have?

Turid Rugaas originally described around thirty calming signals, though in practice trainers tend to focus on the ten to twelve that appear most often in everyday handling, training, and greeting situations. The exact number matters less than the principle: no single signal is diagnostic on its own. A lone yawn after a nap is just a yawn. What reliably indicates discomfort is stacking — two, three, or four signals appearing within a few seconds, such as a lip lick, a head turn, and a paw lift in quick succession. Counting signals is less useful than counting how many are happening at once and how fast they are piling up. If you are unsure how many signals a photo actually contains, our AI dog body language analyzer maps each visible cue for you.

Where PetSignal.ai fits in

Our Purdue Body Signal Engine is built around exactly this vocabulary. When you upload a photo or video, we map what we see to the structured signal list — ears, eyes, mouth, tail, posture, muscle tension, weight distribution, and behavior markers — and tell you which calming signals are stacked. We never claim to translate what your dog is "saying," because the science does not support that framing. For deeper coverage of individual signals, see the dog body language guide.