Quick Answer: Dogs communicate almost entirely through body language — tail position, ear position, eye contact, posture, and subtle signals like lip-licking and yawning. Most dog bites happen because the human missed or misread warning signs. Learning to read these signals accurately is one of the most important things any dog owner (or anyone who spends time around dogs) can do.
Dogs do not communicate the way humans do. They cannot tell you they’re uncomfortable, scared, or overstimulated. What they can do is broadcast their internal state through a remarkably detailed system of body signals — and they do it constantly. The problem is that most people were never taught to read it.
The Relaxed, Happy Dog
Start by knowing what calm looks like so you can recognize departure from it:
- Tail: Held at mid-height, wagging loosely in wide arcs (a helicopter tail in large dogs is full-body happiness)
- Ears: In their natural resting position for the breed — neither flattened back nor rigidly forward
- Eyes: Soft, almond-shaped, normal-sized pupil. Sometimes “soft eyes” — slightly squinting
- Mouth: Relaxed, may be open with loose, lolling tongue
- Body: Loose, wiggly, weight distributed evenly
- Posture: Neither crouched nor stiffly upright
Stress and Anxiety Signals (Calming Signals)
Norwegian dog trainer Turid Rugaas identified a set of behaviors she termed “calming signals” — actions dogs use to communicate discomfort and to attempt to de-escalate tension. These are easy to miss because they look benign:
- Yawning — not tiredness, but a stress response when happening in the wrong context (at the vet, when approached by a stranger)
- Lip-licking — a single tongue flick without food present is a classic stress signal
- Turning the head or body away — refusing eye contact or turning the body sideways is a de-escalation attempt
- Sniffing the ground suddenly — when nothing is there to sniff, sudden ground-sniffing is usually an attempt to avoid a situation
- Shaking off — like a dog shakes off water after a bath; this “shake off” behavior after an interaction is a physiological stress release
- Blinking and slow blinking — a soft signal that communicates non-threat
- Sitting or lying down — sometimes a dog will suddenly sit when approached; this can be an attempt to appear non-threatening
Fear and Discomfort — When the Dog Wants to Leave
- Tail tucked — between the legs, or tightly pressed to the abdomen. Degree of tuck correlates with degree of fear
- Ears pinned flat — against the skull, not just back
- Body lowered — crouching, making themselves smaller
- Trembling — shaking without a cold environment
- Whale eye — the whites of the eyes showing in a crescent shape; this is a significant fear signal
- Leaning or moving away — a dog that leans back when approached or tries to create distance is communicating clear discomfort
- Panting when not hot — stress panting has a different quality than heat panting; often accompanied by other stress signals
Arousal and Alertness — Approaching Threshold
These signals mean the dog is highly stimulated and approaching their threshold for a reactive or aggressive response:
- Tail held high and stiff — not a wagging tail; this is a flagging tail, sometimes vibrating slightly. Often misread as a happy signal.
- Ears hard forward — rigidly upright and facing whatever the dog is fixated on
- Hard stare — unblinking, direct, fixed gaze on a target. This is the precursor to aggression in most dogs
- Weight shifted forward — forward lean, on the toes
- Hackles raised — piloerection along the back and/or shoulders; can indicate arousal, fear, or both simultaneously
- Stillness — a freeze in posture, particularly when combined with a hard stare. This is often the last warning before a snap or bite
The Escalation Ladder
Veterinary behaviorist Dr. Sophia Yin’s work describes a dog’s stress communication as an escalation from subtle to overt. A dog that has been heard (its signals acknowledged and the situation changed) does not need to escalate. Most bites happen because the subtle signals were missed or ignored, forcing the dog to escalate to behavior that cannot be ignored.
The escalation sequence typically runs: subtle stress signals → more obvious avoidance → growl → snap (with missed bite) → bite. The growl is not the problem — it is the warning. A dog that has been punished for growling has been taught to remove its warning without removing its discomfort. This is significantly more dangerous than a dog that growls.
Reading the Whole Dog
Individual signals must be interpreted in context and as part of the whole picture. A wagging tail on a dog with a stiff body, forward ears, and hard eyes is not a friendly dog. A dog cowering with ears flat but tail slightly wagging may be offering appeasement. The clusters matter more than any individual signal.
Understanding your dog’s individual baseline is also important. Some breeds have physical traits that modify how body language reads — a Nordic breed with a naturally curled tail, a breed with permanently forward-set ears, a breed with a loose, floppy tail. Learn your specific dog’s normal so you can read deviations from it.
SJ
Susan J
Online Editor, Doggie General
Susan J has spent more than a decade writing about dog care, behavior, and training. A dog owner since childhood with hands-on experience across Labradors, mixed breeds, and rescue dogs, she draws on guidance from veterinary and behavioral organisations to make expert knowledge practical for everyday owners. Read more about Susan J →
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Written and reviewed by the Doggie General editorial team. This article is general information for dog owners, not veterinary advice. If your dog is unwell or you are worried about its health or behavior, contact your veterinarian. When you buy through links on this site we may earn a commission.