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Watch two dogs meet, and a surprising amount can happen before either one makes a sound. There’s sniffing, circling, a glance that lasts half a second, perhaps an extremely thorough rear-end inspection — and then they’re either bouncing around like old friends or one suddenly wants nothing to do with the other.
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To us, the change can seem instant. To the dogs, it probably wasn’t.
They’ve been watching tiny shifts in posture, facial expressions, movement, and even gathering information through scent. A head turn that looks meaningless to us may be perfectly clear to another dog.
And that’s where dog communication gets fascinating: the barking, growling, and wagging we notice may be only the most obvious part of a much bigger conversation.
Here’s what your dog is noticing that you might be missing.
How Do Dogs Communicate With Each Other?
Dogs communicate through body language, facial expressions, scent, sound, touch, and the way they respond to one another. But reading those signals isn’t as simple as memorizing that a wag means this or a growl means that.
Dogs read the whole interaction. The same behavior can mean something very different depending on the dog’s posture, what happened immediately before it, and how the other dog responds.
1. Body Language: Look Beyond The Wagging Tail
When dogs interact face-to-face, body language can communicate a lot without a sound. Every shift in weight, tail carriage, or muscle tension can convey valuable information. Once you start noticing it, you’ll see your dog “talking” all the time.
Key Body Signals To Notice
Dogs read each other’s posture like a language and adjust their own bodies in response, often faster than humans notice.
- Tail position
- High and stiff: heightened arousal, confidence, or tension
- Tucked or low: fear, uncertainty, or an attempt to appear less threatening
- Loose wag: often associated with a relaxed, friendly interaction, but wagging doesn’t automatically mean happy
- Fast wag with a wiggly butt: often excitement or enthusiasm
- Posture
- A dog standing tall with its weight shifted forward may be highly alert, tense, or preparing to react.
- A crouched body with ears back and head lowered can signal uncertainty or appeasement.
- The “play bow” (front down, butt up)
This is a classic invitation to play. It can also help tell another dog that the pouncing, chasing, or general four-legged nonsense that follows is meant in fun. - Hackles raised
When the hair along a dog’s back stands up, it signals arousal. Excitement, uncertainty, fear, stress, or an intense interaction can all cause it, so raised hackles alone don’t mean a dog is aggressive. - Turning away
Dogs may use this behavior during uncomfortable or tense interactions to avoid confrontation, reduce social pressure, or create a little space. - Freezing
Sometimes the signal to watch for is when a dog suddenly stops. A brief freeze can signal uncertainty or rising tension, especially if the dog’s body stiffens or another dog gets too close. Watch what happens next.
What Science Says
A 2013 study published in Current Biology found that dogs can discern emotions by observing left- or right-asymmetric tail wags. Wagging more to the right indicated a more relaxed emotion, while tail wags to the left conveyed uncertainty or wariness.
2. Dog Facial Expressions: The Small Signals We Often Miss
Dogs use their faces to signal intent, but some of these cues are so subtle that owners barely notice them. Another dog may pick up on a change in eye contact, mouth tension, or head position long before we realize anything has changed.
Key Facial Expressions To Notice
- Eye contact
A prolonged, fixed stare can signal tension or a challenge, while breaking eye contact or looking away may help reduce social pressure. - Whale eye (white of the eye showing)
Seeing more of the whites of a dog’s eyes can be a subtle sign of stress or discomfort, particularly when it appears alongside a tense body or an attempt to move away. - Mouth position
- A relaxed mouth with loose lips and a soft pant typically means a dog is at ease.
- A suddenly closed or tense mouth can be worth noticing, especially if other parts of the dog’s body stiffen at the same time.
- A snarl exposes the teeth and is a much clearer warning.
- Some dogs also display a submissive grin, showing their teeth during greetings or appeasing interactions rather than as a threat.
- Ear position
- Relaxed ears usually convey a neutral and unconcerned emotion.
- Flattened or tightly pinned ears can appear when a dog is worried, uncomfortable, or defensive.
- Ears held high and forward often indicate alertness or intense interest.
- Lip licking, yawning, or looking away
These easy-to-miss behaviors can appear when a dog is uncertain, uncomfortable, or trying to reduce the intensity of an interaction. A dog looking away isn’t necessarily ignoring the other dog. That may be part of the conversation.
3. Scent Communication: Why Dogs Sniff So Much
To humans, scent is subtle. To dogs, it can reveal information we can’t detect at all. Dogs use smell to investigate other dogs, recognize individuals, and gather social information, including clues about who another dog is and what’s going on with them — sometimes without the other dog even being there.
Dogs can do this because their sense of smell puts ours to shame. Their noses contain vastly more olfactory receptors than ours, and they also have a specialized structure called the vomeronasal organ (Jacobson’s organ) that detects certain chemical signals.
The Jacobson’s organ sends chemical information to areas of the brain involved in social and reproductive behavior, helping dogs interpret signals from other animals and their environment. It gives dogs access to an entire layer of chemical information that humans simply can’t perceive.
Urine Marking
Dogs leave chemical information through their urine, which other dogs can investigate long after they’ve moved on. So when your dog spends an unreasonable amount of time analyzing one particular patch of grass, there may be considerably more going on than “someone peed here.”
Sniffing Each Other’s Rear Ends
Weird to us, perfectly sensible to them. Secretions from the anal glands contribute to an individual dog’s scent, giving other dogs information about who they’re meeting. Scent cues can provide clues about identity, sex, reproductive status, health, and aspects of a dog’s physiological state.
In other words, that prolonged butt sniff does some of the work humans do by looking at a face, asking questions, and making a first impression — just with considerably less respect for personal space.
Sniffing Where Other Dogs Have Been
Dogs don’t need a face-to-face meeting to gather information. Urine, feces, and other scent left behind can give them something to investigate after another dog has already gone.
Chemical Signals
Dogs can detect chemical cues from other animals that may provide information related to reproductive status and physiological or emotional state.
Sniffing also happens during social interactions. A dog may sniff the ground, another dog, or the surrounding area while deciding what to do next. As with body language, context matters — and not every dog wants another dog’s nose in its personal business indefinitely.
4. Vocal Communication: Barking, Growling & Other Dog Sounds
Dogs may communicate plenty without making a sound, but barks, growls, whines, yelps, and howls add another layer to the conversation.
Just like humans interpret tone, dogs respond to differences in pitch, rhythm, repetition, and intensity. But a sound rarely tells the whole story. The body attached to the bark or growl matters just as much.
Barking
Dogs bark to alert, protest, invite play, express excitement, or respond to frustration. Higher-pitched, rapid barking often accompanies excitement or play, while deeper, more forceful barking may appear when a dog is alarmed, defensive, or warning another dog to keep its distance.
Repetition matters, too. A few sharp barks during an introduction can mean something different from barking that becomes faster, louder, and more intense as another dog approaches.
Growling
A growl can be a warning, but dogs also growl during play. A low, sustained growl paired with a stiff body, fixed stare, or attempts to create distance deserves more attention than the growling alone. The dog may be warning another dog that the interaction has gone far enough.
Play growls tend to occur alongside very different body language: loose movements, bouncing, play bows, pauses, and continued voluntary engagement from both dogs.
Growling is a particularly good example of why you can’t interpret canine communication from a single signal.
Whining & Yelping
Dogs whine for many reasons, including excitement, frustration, stress, anticipation, or discomfort. A higher-pitched whine during an interaction may accompany uncertainty or rising excitement, so look at whether the dog is eagerly moving closer, hanging back, trying to leave, or showing other signs of tension.
A sudden yelp is usually more abrupt and may signal pain, surprise, or that play became too rough. The other dog’s response can be informative, too — socially skilled dogs may pause or back off when their playmate objects.
Howling
Howling is a long, sustained vocalization that can function as long-distance communication. Dogs may howl in response to other dogs, social separation, or sounds such as sirens, and some breeds are considerably more inclined to do it than others.
Dogs from different breeds and backgrounds can also vocalize at very different levels. Some communicate relatively sparingly. Others seem to have discovered an entire bonus vocabulary (we’re looking at you, Huskies).
5. Tactile Communication: Pawing, Mounting, Nudging & Physical Play
Physical contact isn’t random. Dogs use touch during greetings, affection, play, and moments when they’re figuring out how much interaction the other dog is willing to tolerate.
Touch creates immediate feedback. One dog does something; the other responds by engaging, moving away, pausing, or objecting. That response is often more informative than the original behavior.
Common forms of physical communication include:
Pawing
Dogs may paw at another dog to initiate interaction or keep play going. Puppies commonly experiment with paws during play, but whether the gesture is welcome depends on what the other dog does next.
Muzzle Nudging & Licking
Dogs may nudge or lick around another dog’s muzzle during greetings and other social interactions. Puppies also lick around an adult dog’s mouth, a behavior with roots in early canine social behavior. In adult dogs, muzzle licking can appear during friendly, excited, or appeasing interactions.
Leaning & Body Contact
Dogs that are comfortable with one another may lean, rest against each other, or choose close physical contact. During play, dogs may also deliberately bump and press against one another.
Body Slams & Shoulder Bumps
Some dogs play with their entire bodies. A body slam between two enthusiastic wrestlers can be perfectly welcome; the same move, repeated at a dog trying to leave, is a very different interaction.
Mounting
Mounting isn’t automatically sexual or an attempt to “dominate” another dog. It can appear during high excitement, arousal, stress, or play.
The more useful question is whether the other dog welcomes it. Repeated mounting after another dog moves away, freezes, or objects can quickly create tension.
Mouthing & Nipping
Puppies and adolescents commonly use their mouths during social play, learning from the reactions they get when they bite too hard or become too rough.
Adult dogs may mouth during play as well. Look at pressure, body tension, reciprocity, and whether both dogs repeatedly choose to return to the interaction.
The same physical behavior can look completely different depending on who initiates it, how the other dog responds, and whether both dogs remain willing participants.
6. Social Intelligence: How Dogs Learn and Adapt Their Communication
Dogs aren’t born knowing exactly how to handle every social situation. They develop and refine communication skills through experience with other dogs, learning which signals work, when another dog wants space, and when play has gone too far.
Puppies Start Learning Early
Some of a puppy’s earliest lessons come from interactions with their mother and littermates. During play, puppies experiment with chasing, wrestling, mouthing, pawing, and vocalizing — and the reactions they get provide immediate feedback.
Bite inhibition is a good example. When one puppy bites too hard, the other may yelp, stop playing, or move away. That consequence helps the puppy learn that using too much pressure can make the fun disappear.
Puppies also get practice approaching, retreating, pausing, re-engaging, and responding when another dog objects. They’re not memorizing a set of canine rules; they’re learning through thousands of tiny exchanges.
Socialization Is About Quality, Not Just Quantity
Socialization doesn’t mean introducing a puppy to as many dogs as possible. Positive, appropriately managed experiences matter more than sheer numbers.
A puppy repeatedly overwhelmed by rough or intimidating dogs isn’t necessarily learning better social skills. Experiences with suitable dogs help puppies practice reading signals, adjusting their behavior, and learning that not every dog wants to interact the same way.
Dogs Keep Adapting
Adult dogs continue learning from their interactions. Some readily adjust their play style for a smaller, older, or more cautious dog. Others may struggle to notice subtle requests for space or become overexcited before they respond.
Experience can also shape how a dog approaches future interactions. A dog may learn that a particular playmate loves being chased but hates wrestling, or that another dog needs a slower greeting before joining in. Dogs that see each other regularly can develop familiar patterns of play and interaction that wouldn’t necessarily work with a stranger.
This adaptability is part of what makes dog-to-dog communication so interesting. Dogs aren’t simply sending a fixed set of signals — they’re responding to the individual dog in front of them.
Are They Playing, Or Is Tension Building?
Dog play can look surprisingly dramatic. There may be chasing, growling, body slams, open mouths, wrestling, and the occasional maneuver that looks like it belongs in professional wrestling.
So instead of judging play by how rough it looks, watch what happens between the dogs.
Signs Both Dogs Are Still Having Fun
Healthy play tends to have a back-and-forth quality. Look for:
- Loose, exaggerated movements rather than stiff, controlled ones
- Play bows and other invitations to keep the game going
- Role reversals, such as the chaser becoming the chased or the dog on top later ending up underneath
- Brief pauses or breaks before one dog initiates play again
- Both dogs choosing to return after they have an opportunity to move away
That last clue is particularly useful. If the dogs separate for a moment and both voluntarily come back for more, you have valuable information about how each dog feels about the interaction.
Signs The Interaction May Be Changing
Pay closer attention if the play becomes increasingly one-sided or one dog starts trying to disengage. You might notice:
- One dog repeatedly chasing, pinning, mounting, or body slamming the other
- Attempts to move away, hide, or stay near a person
- Play becoming faster or more intense without natural pauses
- Sudden stiffness or freezing
- A fixed stare or increasingly tense facial expression
- Growling or other vocalizations accompanied by tense rather than loose body language
- One dog ignoring repeated attempts by the other to end the interaction
The important part is often the shift. Two dogs may be happily wrestling one moment, but if one stops participating and the other keeps pushing, the conversation has changed.
When Dogs Misunderstand Each Other (And Why Conflicts Happen)
Dogs may share many of the same communication signals, but that doesn’t mean every dog interprets every interaction perfectly. Age, experience, physical appearance, play style, and even how excited a dog is in the moment can affect how well two dogs understand each other.
Sometimes the problem isn’t that either dog is communicating badly. Their styles simply don’t match.
Their Play Styles Are Very Different
One dog may love chasing, wrestling, and full-contact play while another prefers brief greetings and more personal space. A young, enthusiastic dog can overwhelm an older or more reserved dog without intending to start trouble.
This is where those requests to slow down or back off matter. Trouble is more likely when one dog keeps escalating the interaction while the other keeps trying to disengage.
Their Bodies Can Make Signals Harder To Read
Selective breeding has changed some of the physical features dogs normally use to communicate. Flat faces may make facial expressions less obvious, while very short tails, heavy facial wrinkles, long coats, or certain ear shapes can obscure visual signals another dog might normally rely on.
That doesn’t mean dogs with these traits can’t communicate successfully. It means another dog may have less visual information to work with, particularly during a first meeting.
They Have Different Social Histories
Dogs bring previous experiences into new encounters. A dog that had plenty of positive interactions with different dogs while young may approach a social situation differently from one with limited experience or a history of frightening encounters.
Past experience can also affect what a dog finds comfortable. A greeting that one dog considers perfectly ordinary may feel like far too much, far too fast to another.
Excitement Can Get In The Way
Even dogs with good social skills can become so aroused that they stop responding well to another dog’s signals. Chasing gets faster, wrestling gets rougher, or one dog keeps trying to restart a game the other has clearly finished.
Leashes can complicate greetings, too. They restrict a dog’s ability to approach, curve away, increase distance, or leave altogether — options dogs may use naturally when interacting off-leash.
Sometimes two dogs don’t need more time to “work it out.” They need enough space for both of them to make better choices.
5 Dog Communication Signals Humans Commonly Misread
Dogs aren’t the only ones who can misunderstand a conversation. Humans are particularly good at spotting one familiar behavior and deciding we know exactly what it means.
Usually, there’s more information on the table.
1. “His Tail Is Wagging, So He’s Friendly”
A wagging tail tells you a dog is emotionally aroused or engaged, but it doesn’t tell you by itself whether that emotion is friendly. Look at the tail’s height and movement, along with the dog’s posture, face, and overall looseness.
A loose wag on a wiggly dog is very different from a high, stiff wag on a dog that has suddenly stopped moving.
2. “They’re Growling. They’re Fighting.”
Growling can certainly be a warning, but it’s also common during play. Two dogs can sound as though they’re settling an ancient blood feud while happily wrestling across the living room.
Watch what their bodies are doing. Loose movement, role reversals, pauses, and both dogs returning to the game tell you much more than volume alone.
3. “They’ll Work It Out.”
Sometimes dogs negotiate minor disagreements perfectly well. That doesn’t mean owners should ignore repeated attempts by one dog to leave, hide, create distance, or stop an interaction.
If one dog keeps saying “I’m finished” and the other keeps restarting the conversation, giving them a break may be more appropriate than waiting to see who becomes more persuasive.
4. “He Just Needs More Socialization.”
More exposure isn’t automatically better. A dog that’s frightened or overwhelmed by other dogs may not benefit from repeated uncomfortable interactions.
Good social experiences should help a dog feel safe and practice useful communication, not simply increase the number of dogs they’ve encountered.
5. “He’s Trying To Dominate The Other Dog.”
Behaviors such as mounting, pawing, standing over another dog, or rough physical play are sometimes labeled “dominance” when excitement, stress, play style, frustration, or the immediate social situation may provide a better explanation.
Rather than trying to determine which dog is “in charge,” watch what happens next: Does the other dog engage, move away, become tense, object, or try to end the interaction?
Should You Step In?
Not every growl, wrestling match, or awkward greeting requires human intervention. But you also don’t have to wait for an interaction to turn into a fight before giving dogs some space.
A useful question is: Do both dogs still appear to have a choice in what’s happening?
Let Them Continue
You can generally keep observing when:
- Both dogs have loose, relaxed bodies
- Play goes back and forth rather than staying one-sided
- They pause naturally and then choose to re-engage
- Either dog can move away without being immediately pursued
- Both dogs continue voluntarily returning to the interaction
Give Them A Break
Create some space when:
- One dog repeatedly tries to disengage while the other keeps following
- Chasing, mounting, pinning, or body slamming becomes increasingly one-sided
- Play keeps getting faster or more intense without pauses
- One dog starts hovering near you, hiding, or repeatedly moving away
- Subtle requests for space aren’t changing the other dog’s behavior
Step In Before It Escalates
End the interaction if you see sustained stiffness or freezing, hard staring, cornering, repeated attempts to escape, or warning signals the other dog keeps ignoring.
And don’t reach between two dogs if a fight has already started. Putting your hands near their heads can result in a redirected bite.
Quick Guide: Don’t Read One Signal In Isolation
When you’re trying to figure out what two dogs are communicating, start with what catches your attention — then look at the rest of the dog and what happens next.
| What You Notice | Look At Next | What It Could Tell You |
|---|---|---|
| Tail wagging | Is the body loose and wiggly or stiff and still? How high is the tail? | Excitement, friendly interest, uncertainty, or heightened arousal |
| Growling | Is the dog loose and playing or stiff and trying to create distance? | Play vocalization, discomfort, or a warning |
| Lip licking or turning away | Is the dog moving closer, staying put, or trying to leave? | Uncertainty, discomfort, appeasement, or an attempt to reduce social pressure |
| Raised hackles | What are the face, posture, and other dog doing? | Heightened arousal, which could come from excitement, uncertainty, fear, or tension |
| Freezing | Did the dog suddenly become stiff? What happened immediately beforehand? | Increasing discomfort, uncertainty, or tension that deserves attention |
| Play bow | Does the other dog respond and voluntarily join in? | Usually an invitation to play or a signal that playful behavior is intended |
| Mounting or rough physical play | Is the other dog participating or repeatedly trying to disengage? | Play, excitement, stress, or overarousal — and whether it’s welcome matters |
Frequently Asked Questions
Still wondering what your dog is saying around other dogs? Here are some of the questions owners ask most often. If your dog does something around other dogs that leaves you scratching your head, share it in the comments below.
Do Dogs Really “Talk” To Each Other?
Yes, just not with language the way humans use it. Dogs communicate by combining body posture, facial expressions, scent, vocalizations, movement, and physical contact. They also respond to what the other dog does next, creating a back-and-forth exchange that can change from moment to moment.
Why Do Dogs Sniff Each Other’s Butts?
Rear-end sniffing gives dogs access to scent information carried in secretions around the anal area. These chemical cues can provide information about identity, sex, reproductive status, health, and aspects of physiological state.
What looks like an extraordinarily invasive introduction to us is a normal way for dogs to gather information about the animal standing in front of them.
What Does It Mean When Two Dogs Stare At Each Other?
It depends on the rest of their bodies, but a prolonged, fixed stare can be a sign of increasing tension, particularly when paired with stiffness, a closed mouth, forward weight, or freezing.
A brief glance is different from a dog becoming still and locking its attention onto another dog. If neither dog breaks the stare and their bodies become increasingly tense, creating more distance may be appropriate.
Why Does My Dog Lick Another Dog’s Mouth?
Mouth licking can appear during greetings, excitement, appeasing interactions, and social contact. Puppies commonly lick around adult dogs’ mouths, and some dogs continue similar behavior into adulthood.
Watch the recipient, too. A dog that remains relaxed or continues interacting is giving you different information from one that turns away, stiffens, moves off, or repeatedly tries to avoid the licking.
Does A Wagging Tail Mean A Dog Is Friendly?
No. A wagging tail tells you a dog is aroused or engaged, but the wag alone doesn’t tell you whether that arousal is friendly.
Look at the whole dog. A loose, sweeping wag paired with a soft, wiggly body looks very different from a high, tight wag on a stiff dog that’s staring at another dog.
Why Do Dogs Growl At Each Other While Playing?
Growling is common during play, particularly during wrestling, chasing, and tugging. The best clue is what the rest of the interaction looks like.
If both dogs remain loose, take breaks, and voluntarily return to the game, the growling is more likely part of play. Stiffness, escape attempts, hard staring, or increasingly one-sided behavior deserve closer attention.
Why Does My Dog Freeze When Another Dog Approaches?
Freezing can indicate uncertainty, discomfort, or rising tension, particularly when a dog suddenly stops moving during an interaction. Pay attention to what happened immediately beforehand and what follows.
A dog that freezes, becomes stiff, stares, or tries to create distance may be signaling that the interaction is becoming uncomfortable. Don’t assume stillness means the dog is fine simply because they aren’t barking or growling.
Can Dogs Understand Dogs They’ve Never Met?
Often, yes. Dogs share many common communication signals, which allows unfamiliar dogs to gather information about each other surprisingly quickly.
But first meetings aren’t foolproof. Differences in social experience, play style, physical features, and individual temperament can make some dogs harder for others to read, which is one reason introductions deserve supervision.
When Your Dog Needs Help Around Other Dogs
Some dogs need more help navigating interactions with other dogs, particularly if they become overwhelmed, overexcited, fearful, or reactive. Training can help owners manage those situations, build useful skills, and recognize when their dog needs more distance rather than more interaction.
Many of our team members have achieved significant success through online dog training courses, which are significantly more affordable. The best online dog training sites provide excellent, step-by-step tutorials with video, tips, and even personalized feedback from certified dog trainers.
Have you noticed any of these communication signals in your own dog? Every dog has a unique way of expressing themselves. Share your experiences, questions, or observations in the comments below. Your story may help another dog owner better understand their pup.
