Dog shows teeth but isn't aggressive? It might be a submissive grin
Nov 02, 2026, 07:40 IST
Dog shows teeth but isn't aggressive? It might be a submissive grin
Image credit : AI
Observing a dog's appeasement behaviour, a gentle approach with a soft grin.
A dog that pulls back its lips and shows its front teeth without any other sign of aggression is often doing something quite different from threatening you. The submissive grin is a real, documented behaviour with a specific social function, and once you know what to look for, you will never misread it the same way again.
Highlights
- The submissive grin, a specific facial display in dogs, signals deference rather than threat, characterized by a relaxed body and low wagging tail, distinguishing it from a true aggressive snarl.
- Research by Alexandra Horowitz at Barnard College highlights that dogs express behaviors commonly associated with guilt, such as the 'guilty look,' in response to owners' tone and body language, rather than as an indication of moral wrongdoing.
- While the submissive grin itself is typically not problematic, changes in its frequency or context can indicate discomfort or anxiety, warranting consideration for behavioral evaluation by a veterinary behaviorist.
The first time most owners see it, the stomach drops. The dog approaches, tail low and wagging, and then the lips peel back to show a row of teeth. It looks like a snarl. It is not.
A submissive grin is a specific facial display in which a dog retracts its upper lip to expose the front teeth, usually the incisors, while the rest of its body signals deference rather than threat. The muzzle is typically relaxed rather than wrinkled. The ears are back or flat. The tail is low or tucked, often wagging in short, fast strokes. The body may be lowered or the dog may approach in a curved line rather than head-on. Taken together, these signals say the opposite of what the teeth alone might suggest.
The behaviour is sometimes called a "submissive smile" in popular writing, though the word smile carries human baggage that is worth setting aside. The dog is not experiencing joy in the way that phrase implies. It is performing a social signal that has a specific function in canine communication: appeasement.
Dogs are highly attuned to social hierarchy and conflict avoidance. When a dog greets a person or another dog it perceives as higher-ranking or potentially threatening, it has a repertoire of appeasement signals, turning away, exposing the belly, licking at the mouth of the other individual, and in some dogs, producing this lip retraction. The grin communicates something close to: I am not a threat, I am not competing with you, please do not escalate.
The behaviour appears more often in certain individual dogs than others. It is not universal across the species. Some dogs use it frequently in greetings, particularly with people they know well, and owners often interpret it as the dog being happy to see them, which is not entirely wrong, though the mechanism is appeasement rather than expressed happiness. The distinction matters because it tells you something different about what the dog needs from the interaction.
A threat-based snarl looks and feels different. The muzzle wrinkles, pulling the skin up toward the nose. The lips may retract further, exposing the canine teeth and sometimes the premolars. The body stiffens: weight forward, tail raised, hackles up, gaze hard and direct. The dog is not approaching in a curve, it is square-on, or it is holding very still. The overall impression is tension, not deference.
The submissive grin, by contrast, comes with a loose body. The dog is usually moving toward you, not bracing. The tail movement, if present, is fast and low rather than slow and high. The eyes are soft, not hard. If you are uncertain which you are looking at, the rest of the body will tell you. A dog showing appeasement signals throughout its body is not threatening you. A dog whose body is rigid and forward while showing teeth is.
One situation that can cause genuine confusion: some dogs produce a submissive grin when they are also mildly anxious, which can make the overall picture messier. If the grin appears alongside panting, yawning, lip-licking, or attempts to move away, the dog is telling you it is not entirely comfortable. The appeasement signal is still appeasement, but the anxiety signals are worth paying attention to.
The submissive grin sits in the same family of behaviours as what owners commonly call the guilty look, the cowering, the averted gaze, the tucked tail a dog shows when an owner comes home to a mess. Research by Alexandra Horowitz at Barnard College found that dogs produce these appeasement displays in response to the owner's tone and body language, not in response to having done something wrong. Dogs who had not misbehaved showed the same displays when owners acted as though they had. The look is a response to perceived social threat, not an expression of moral awareness.
The submissive grin works the same way. It is a response to a social situation the dog is reading as one that calls for deference, a greeting with a person who is taller, louder, more excited, or simply unfamiliar. The dog is not smiling because it is happy, and it is not snarling because it is dangerous. It is managing a social moment using the tools its species developed for exactly that purpose.
The submissive grin on its own, in a dog with an otherwise relaxed body, is not a problem. It does not need to be trained away. Many owners come to find it endearing once they understand it.
Pay closer attention if the grin starts appearing in situations where the dog previously seemed comfortable, a familiar person, a routine greeting, a context that has not changed. A new or expanding appeasement display can signal that something in the dog's experience has shifted: pain that makes it more cautious around touch, anxiety that has increased for a reason you have not identified, or a change in the household dynamic it is responding to. If the grin is accompanied by growling, snapping, or hard staring at any point, that combination warrants a call to a veterinary behaviourist rather than a training adjustment at home. Teeth plus tension is a different conversation from teeth plus a wagging tail.
What the submissive grin actually is
The behaviour is sometimes called a "submissive smile" in popular writing, though the word smile carries human baggage that is worth setting aside. The dog is not experiencing joy in the way that phrase implies. It is performing a social signal that has a specific function in canine communication: appeasement.
The social function behind the display
The behaviour appears more often in certain individual dogs than others. It is not universal across the species. Some dogs use it frequently in greetings, particularly with people they know well, and owners often interpret it as the dog being happy to see them, which is not entirely wrong, though the mechanism is appeasement rather than expressed happiness. The distinction matters because it tells you something different about what the dog needs from the interaction.
How to tell it apart from an actual threat display
The submissive grin, by contrast, comes with a loose body. The dog is usually moving toward you, not bracing. The tail movement, if present, is fast and low rather than slow and high. The eyes are soft, not hard. If you are uncertain which you are looking at, the rest of the body will tell you. A dog showing appeasement signals throughout its body is not threatening you. A dog whose body is rigid and forward while showing teeth is.
One situation that can cause genuine confusion: some dogs produce a submissive grin when they are also mildly anxious, which can make the overall picture messier. If the grin appears alongside panting, yawning, lip-licking, or attempts to move away, the dog is telling you it is not entirely comfortable. The appeasement signal is still appeasement, but the anxiety signals are worth paying attention to.
What the research says the "guilty look" has in common with this
The submissive grin works the same way. It is a response to a social situation the dog is reading as one that calls for deference, a greeting with a person who is taller, louder, more excited, or simply unfamiliar. The dog is not smiling because it is happy, and it is not snarling because it is dangerous. It is managing a social moment using the tools its species developed for exactly that purpose.
When to take it to a vet or behaviourist
Pay closer attention if the grin starts appearing in situations where the dog previously seemed comfortable, a familiar person, a routine greeting, a context that has not changed. A new or expanding appeasement display can signal that something in the dog's experience has shifted: pain that makes it more cautious around touch, anxiety that has increased for a reason you have not identified, or a change in the household dynamic it is responding to. If the grin is accompanied by growling, snapping, or hard staring at any point, that combination warrants a call to a veterinary behaviourist rather than a training adjustment at home. Teeth plus tension is a different conversation from teeth plus a wagging tail.