Sorry, but It’s Not OK for Your Dog to Kiss You

I know I’m going to sound like a real killjoy here, but a dog’s mouth and lips can be contaminated with some pretty unpleasant things.

Dog saliva contains a potent brew of bacteria, so think twice about mouth-to-mouth kisses. By: dannohung

Does your dog kiss you?

People tend to feel strongly, one way or the other, on the subject of canine “kisses.” While some folks welcome a lickety-lick on the lips, others throw their hands up in horror — and while some see a canine kiss as a sign of affection, others recoil at the risk of infection.

What is the truth? Is it OK for a dog to lick your mouth, or will it make you ill? Read on to make up your own mind.


Hound Hygiene

There is an urban myth that a dog’s mouth is cleaner than our own. This misconception has arisen largely because the mouths of humans and dogs contain different bugs.

However, when you think about what dogs lick…this puts another perspective on those different bugs.

And this is where the first problem with kisses comes in. That “doggy breath” is caused by a mixture of bacteria, plaque and inflammation. When dogs lick you, they’re transferring those doggy bugs onto your skin or into your mouth.

A study by Japanese scientists found that dog saliva contained bacterial pathogens that could cause periodontal disease in humans. That means gum inflammation that can potentially lead to the loosening and loss of teeth. Worse still, if those bugs get into the bloodstream, they can cause infection in the heart or kidney.

Antiseptic Saliva?

Wait a minute, I hear you say — doesn’t dog saliva have disinfectant properties?

This is something I come across regularly as a veterinarian, when people let their dog lick a wound or a surgical incision. They believe that licking is OK because of the natural disinfectant properties of saliva.

This is something the scientists looked into and came up with and “yes but no” answer. It turns out dog saliva is weakly antiseptic toward E. coli and streptococci but little else. Because the most common skin pathogens are staphylococci, licking is a bad choice, especially as it makes the area moist and therefore a better environment in which bugs may breed.


With regard to the dog kissing you, those weak antiseptic properties certainly are not enough to protect your health.

Training your dog to stop licking can prevent you from picking up harmful infections. By: Tony Alter

Bug Breath

I’m going to sound like a real killjoy here, but a dog’s mouth and lips can be contaminated with some pretty unpleasant things. Just think of those delightful habits of eating poop and scavenging trash, and it’s little wonder a dog could be carrying infectious agents such as salmonella, campylobacter, giardia or toxocara.

The effects of that slurpy kiss could persist in some very unpleasant ways long after the saliva has dried. And that’s without taking the behavioral side of licking and kissing into account.

Lick That Behavior

Dogs love to lick.

A mother licks her newborn puppies in order to stimulate them to pass urine and feces. A dog licks their paw in order to comfort themselves, just like a child sucks their thumb. Dogs lick to find out about their environment and read scent messages.

This cute pit bull can’t wait to impart some bacteria-laden saliva onto his human’s face:

However, what many people fail to realize is that licking can be a sign of anxiety. The first time your dog licks you, it could be because the dog is worried and is giving you an appeasement signal. Rather than saying, “I love you,” he’s actually saying, “I’m a bit scared of you.”

But licking is habit forming, so when you giggle and give the dog a fuss, he’s likely to repeat the action to get attention. This can lead to unwelcome licking that is intrusive and downright soggy.

To break this habit, say, “No” in a firm voice, get up and walk away. Denying the dog attention when he licks sends out a strong message that it displeases you.

Alternatively, you can put the behavior on cue and teach the dog a “lick” command. This then gives you the means to teach a “No kiss” command when you want licking to stop.

Canine kisses may be cute, but they’re not without hazard. You do risk picking up infections. So why not teach your dog a healthy “high-five” greeting instead?



This pet health content was written by a veterinarian, Dr. Pippa Elliott, BVMS, MRCVS. It was last reviewed Oct. 13, 2018.

Dr. Pippa Elliott, BVMS, MRCVS

View posts by Dr. Pippa Elliott, BVMS, MRCVS
Dr. Pippa Elliott, BVMS, MRCVS, is a veterinarian with nearly 30 years of experience in companion animal practice. Dr. Elliott earned her Bachelor of Veterinary Medicine and Surgery from the University of Glasgow. She was also designated a Member of the Royal College of Veterinary Surgeons. Married with 2 grown-up kids, Dr. Elliott has a naughty Puggle named Poggle, 3 cats and a bearded dragon.

Please share this with your friends below:

Also Popular


  1. Jayne Dough
    February 7, 2016

    By bugs, do you mean germs?

    1. Melissa Smith
      February 8, 2016

      Jayne, looking at the context of the article where salmonella and other germs are mentioned, I would guess yes. 🙂

  2. Ashley Rockhold
    May 9, 2017

    If you are afraid of getting sick then stay in your house and build a bubble around yourself

    1. Melissa Smith
      May 11, 2017

      I’m not going to lie, there are times that I am tempted to but not because of dogs – because people are gross! I clean public restrooms and you would not believe how heinous some people can be.

  3. 2SwingDogs
    May 19, 2017

    This article falls short in one very serious way – no discussion of the effects of protein expression in dog saliva. So, it’s not just about ‘infection’; it is about affecting your entire body chemistry.

    My owner mushes dogs…While harnessing a team he got an ‘affectionate’ face wash from one of the lead dogs. Withing 24 hours, his skin became highly sensitive to touch and temperature.

    Discussions with other mushers and ENT’s lead to the same conclusion – protein transfer from saliva.

    Period of recovery – 3 months….with no meds’ taken, or 3 months with meds than can deal with the problem but have very serious side effects.

    BTW: I am a pure bread Malamute; so I don’t carry that specific protein. Regardless, no way I would want to engage in that vary base, human need to kiss – I am a dog and proud of it.

    1. Melissa Smith
      May 20, 2017

      I hope your pet parent is feeling all better! (This is my very first conversation with a pup rather than a parent!)

      1. 2SwingDogs
        May 20, 2017

        An example of proper mushing…

        Major disappointment…I’ve done 10-12mph for over 20 miles…and this guy barely made it up the street at 1. I suggested at least 4 in harness; they gave me one..

        1. Melissa Smith
          May 21, 2017



Leave a Reply

Your email address will not be published.