How can I accurately identify a submissive grin vs aggression?

Although both expressions involve a dog baring its front teeth—which can look terrifying if you are unfamiliar with the expression—they communicate completely opposite intentions. To accurately identify the difference, you must look at the specific shape of the mouth and, most importantly, the dog’s overall body language.

The Aggressive Snarl (Warning): An aggressive snarl is a clear threat, essentially saying, “Look at my weapons” or “Give space.”

• Mouth Shape: The lips curl back to expose clenched teeth. The corners of the dog’s lips typically form the shape of a “C”. You may also notice a wrinkled nose.

• Body Posture: The dog’s body will be stiff, frozen, or tense. They may shift their weight forward to appear larger and more assertive.

• Eyes: You will likely see a “hard stare”—cold, unblinking eyes intensely focused on you.

• Accompanying Cues: A snarl is often paired with a menacing, deep growl, ears pinned flat or pointing sharply forward, raised hackles (hair standing up on the back), and a stiff, twitching tail held high.

The Submissive Grin (Smiling) A submissive grin is an appeasement signal used by a happy or submissive dog to say, “Hello, I come in peace” or “I mean no harm”.

• Mouth Shape: The dog displays its front teeth, but the mouth and expression are generally much more relaxed, and the teeth are typically unclenched.

• Body Posture: The crucial identifier is a loose and wiggly posture. The dog will often crouch or keep its body low to the ground to deliberately make themselves appear smaller and less threatening.

• Eyes: The dog will display “soft eyes” with relaxed lids (sometimes appearing to squint), or they may actively look away and avert their eye contact to diffuse tension.

• Accompanying Cues: The tail is typically wagging freely and loosely, sweeping side-to-side, or held in a low, neutral position.

In summary, if the bared teeth are paired with a stiff, frozen body and an unblinking stare, it is an aggressive warning. If the teeth are paired with a soft, wiggly, and lowered body, it is a submissive, friendly greeting.