10/07/2026
Did you know that the shape of a dog’s lips can tell you if they are completely relaxed,like actually smiling, or highly stressed, or in severe physical danger?Like heat stroke type of danger?You need to look at the commissures (the corners of the mouth)as well as the whole picture.
Here is how to tell the difference:
1. The Relaxed Open Mouth (The True Smile)
• What it looks like: The mouth is softly open, and the corners of the mouth (commissures) are relaxed, neutral, or slightly turned up. You might see a loose, floppy tongue resting gently over the lower teeth.
• The vibe: The eyes are soft, the ears are in a natural position, and the body is loose and wiggly. This dog is happy, content, and safe.
2. The Stress Pant (The Long Lip)
• What it looks like: The mouth is open, but the corners of the mouth are pulled back tightly toward the ears. This is often called a "tight commissure" or a "long lip." The teeth may be more visible, and the panting is rapid and shallow.
• The vibe: The tongue might look rigid or cupped at the end. You will also likely see other signs of stress, like dilated pupils, a furrowed brow, pinned-back ears, or a stiff body. This dog is overwhelmed and needs space or a break.
3. Heat Stroke Alert (The Spatial Lip)
• What it looks like: The mouth is stretched wide open with maximum retraction of the commissures. The tongue is not just hanging out—it is frantically extended, dark red or purple, and often looks wide, flat, or cupped like a shovel. The panting is heavy, loud, and desperate.
• The vibe: This is a medical emergency. The dog may drool excessively (thick, ropey saliva), appear glassy-eyed, lethargic, or unsteady on their feet.
Trainer Tip: Always look at the whole dog! A tight corner of the mouth combined with a tense body means "I’m uncomfortable." A tight corner of the mouth combined with heavy breathing after exercise in the sun means "I need to cool down immediately."
Pay attention to the corners of your dog's mouth!!!!
Photo borrowed from Eileen and Dogs❤️
Dog on the left has tight commisures a furrowed brow,ears back...dog on the right has soft eyes and mouth,tongue is inside the mouth not out and long and curled up and ears sitting more naturally.