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
Oral care is a key component of your pet’s overall health: A smart regimen can help prevent the development of serious conditions. Keeping your pet’s teeth clean and bacteria-free results in more than just healthy teeth and fresh breath. With a little know-how and effort, you can protect your pet for a lifetime of companionship.
Tartar and gingivitis are the most common problems seen by veterinarians. The majority of dogs will develop these problems. Unchecked, these can lead to periodontitis and serious health concerns for your pet, up to and including, tooth loss and serious illness. But you can take action to control this and promote good oral health by incorporating the 3Ds: Daily Brushing, Dentistry. and Diet.
Daily brushing of your pet’s teeth will remove plaque and slow the development of tartar. When first beginning to brush, be gradual and make it a pleasant experience. Start by using your finger. Later, introduce a toothbrush. Be sure to praise and reassure your pet while brushing. Also, reward your pet afterward with play or a walk.
Talk with your veterinarian about annual or semiannual teeth cleaning—a dental prophylaxis or prophy for short. Teeth cleaning, performed by your veterinarian, is the only way to remove tartar.
Diet is important to good oral health. The mechanical, brushing action of dry, crunchy kibbles helps remove plaque and works to scrub teeth clean. Some diets also might include ingredients such as hexametaphosphate (HMP) that can help block tartar formation. Diet, daily brushing, and dentistry helps break the plaque-to- tartar cycle and optimize oral health.