There’s no doubt dogs are affectionate creatures. And they have numerous ways of showing it. So what’s the deal when your furry friend comes up and gives you a big ol’ pooch smooch? Let’s take a tongue-in-cheek look into why.

Dogs are oral creatures and gather a lot of information about their surroundings through taste and smell. Maybe you’re salty after a sweaty run. Maybe you’ve got barbecue sauce on your face. “Dogs can smell a lot better than we can,” says Opens a new windowDr. Jo Gale, BVetMed CertLAS MRCVS, Senior Manager, Global Science Advocacy at Waltham Petcare Science Institute, “so they find a lot more things interesting to lick than we can.” This despite the fact dogs only have about 1,700 taste buds compared to around 9,000 in humans.
In a poll* of dog owners, IAMS™ found a large majority (75%) believe dogs lick people to offer friendliness. That’s definitely a correct assumption. Licking has been a social behavior among dogs since the days of great-great-great granddaddy wolf. 'It’s a standard canine greeting to lick others around the face,” agrees Opens a new windowJames Serpell, B.S., Ph.D., Professor of Humane Ethics & Animal Welfare at the University of Pennsylvania School of Veterinary Medicine. “Junior members of the pack will run around and lick the mouths of more senior members.” Your dog considers you part of their pack, so it’s their way of greeting and welcoming you. Or maybe you still have that barbecue sauce on your face.
In ancient Greece, dogs at the shrine of Asclepius were trained to lick patients. In the Middle Ages, Saint Roch was said to have been cured of a plague of sores through his dog’s licks. The French even have a saying, “langue de chien, langue de médecin,” which translates to, “a dog’s tongue, a doctor’s tongue.”

Don’t cancel your health insurance just yet. While dogs’ saliva does have some possible bactericidal properties against some types of bacteria, it can put you at the risk of exposure to others. Too much licking can also reopen the wound and cause further infection. With modern medicine, you’re much better off hitting the first-aid kit.
And that myth about dogs’ mouths being cleaner than humans’? Not true — both contain over 600 types of bacteria. You’re welcome for that image.
While an occasional canine kiss is “aww”-inducing, some dogs can overdo it to the point of annoyance. When this happens, the best thing to do is “completely ignore it and give no attention,” suggests Dr. Jo Gale. “When they stop, provide them with attention.” Over time your dog will learn to scale back on the smooches.
*Surveyed U.S. dog owners, age 18+
Sample Size: n=201
Fielded May 8-10, 2020
Most humans recognize a hug as a sign of affection and friendship. In an IAMS™ survey*, 83% of dog parents say their dog likes hugs too. But how do dogs feel about them? Bring it in! We’re going to try and get our arms around this question.

Sure, some dogs enjoy a good canine cuddle, but usually only with their owner or household members. Otherwise, they don’t really care for it. “Hugging is too much and overwhelming for many dogs and should be discouraged if the dog doesn’t know the individual very well,” advises
Opens a new windowJames Serpell, B.S., Ph.D., Professor of Humane Ethics & Animal Welfare at the University of Pennsylvania School of Veterinary Medicine.
There are a number of reasons for this:
Hugging is a human behavior, not a dog behavior. They’re just not physically built for that kind of interaction. We stand upright, so we face people. Dogs are on all fours, so it’s an unnatural act for them. They much prefer a friendly sniff to greet other dogs.
To dogs, a hug is seen as a very dominant form of behavior; it feels like a stranger is trying to assert control over them. It can be quite stressful, especially if done by someone they’re not familiar with.
Since ancient dog days, canines’ first instinctive line of defense has been to run away from danger. Hugging takes this primal option away and can make them feel trapped and confined. Remember when you were a kid getting hugged by that loud great aunt you’ve never met at your dad’s second cousin’s wedding? That’s kind of what your dog is feeling. Who is this? What are they doing? They want to escape too.

You can usually tell by their body language, says
Opens a new windowDr. Jo Gale, BVetMed CertLAS MRCVS, Senior Manager, Global Science Advocacy at Waltham Petcare Science Institute: “Watch for trembling, trying to get away, raised hackles or whites around their eyes. It’s very important to pay attention to this behavior and respect it.”
Don’t worry if your dog doesn’t want to hug it out. There are plenty of healthier ways you can show them you’re still their best friend:
*Surveyed U.S. dog owners, age 18+
Sample Size: n=201
Fielded May 8-10, 2020