After a tiring day, returning home to my dog can be a wonderful experience. She eagerly awaits our arrival, wagging her tail enthusiastically and giving us affectionate puppy “kisses.”

One of the most delightful moments? When I smile broadly, she responds with a smile of her own.

But do dogs genuinely “smile” like humans do? We consulted with a veterinarian to understand what our furry companions are expressing.

Do Dogs Actually Smile?

Yes! All dogs can smile, but some breeds are more naturally inclined to do so, according to veterinary behavior expert Dr. Lore Haug. Breeds like Doberman Pinschers, terriers, and cattle dogs are examples.

Dr. Haug explains, “This smile is mainly a friendly greeting behavior aimed at people. Dogs don’t display this kind of smile toward each other.”

When dogs smile, they typically pull back one or both of their lips, revealing some or all of their teeth. This “smiling” often comes along with other friendly gestures, such as approaching, wagging their tails, or even whining.

According to Haug, smiling reflects an “active submission,” which can also be shown through behaviors like bowing down or rolling onto their side.

Why Do Dogs Smirk When They Misbehave?

Sometimes, dogs grin when they feel guilty or when asked to do something they dislike, like taking a bath.

If your dog gives you a sheepish smile after doing something naughty, it’s their way of trying to dodge a scolding from you, Haug explains.

Is It Common for Dogs to Display Their Teeth When Smiling?

Indeed, it is typical for dogs to reveal their teeth when they smile. However, many people often misinterpret this expression as aggression and can become fearful, according to Haug.

“People might react negatively, thinking the dog is growling at them and may respond with aggressive behavior or punishment towards the dog,” Haug notes. “This response could provoke a defensive aggressive reaction in the dog.”

It is crucial to differentiate between a friendly toothy grin and a dog showing signs of aggression. A happy dog usually exhibits a broad, sweeping wag of the tail and approaches or sways their body toward you. They won’t typically growl, although Haug has encountered a few dogs that make a “wheezy grumbling noise” along with their smile.

“In contrast, if a dog is feeling threatened, they may appear stiff with slow movements and a tense posture,” Haug explains. “On the other hand, a dog that is smiling will look relaxed and loose.”