Dogs smile by pulling one or both lips back and may show all or some teeth. This smiling is accompanied by other greeting behavior, like approaching, wagging or even whining.

Yes, it’s normal for dogs to bare their teeth when they smile. The bigger problem is that people often misinterpret a toothy smile as aggression and become scared, Haug says.

Dogs smile by pulling one or both lips back and may show all or some teeth. This smiling is accompanied by other greeting behavior, like approaching, wagging or even whining.