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8th grader's award-winning experiment tested if dogs' tongues are really cleaner than ours

Here's what science says about letting your dog lick your face.

Photo credit: Canva

Should you let a dog lick your face?

With nearly half of the households in American having at least one dog, there's a lot people need to know about them. Our furry friends come in wide variety of breeds, each with their own unique traits and needs. "Man's best friend" can be a guardian, a helpful worker, a loyal friend, and a snuggly companion, but there's one thing almost all dogs have in common: Licking.

Some dogs lick way more than others, but it's rare to find a dog who never licks anyone or anything. Many dogs communicate and show affection by licking, which is sweet—if a little gross—depending on how slobbery they are. There's a common saying that dogs' mouths are cleaner than humans', which is a bit hard to believe when you see what some dogs put in their mouths, but it is true? What does science say about dog tongues and saliva? Is a dog licking our face something we should worry about?

 dogs, dog mouths clean, dog tongues, dog licking, should you let a dog lick your face Pooch smooches are sweet if they're not too slobbery.Photo credit: Canva

It turns out, the answer to whether a dog's mouth is cleaner than ours isn't super straightforward.

An 8th grader named Abby tackled this question in a science experiment that won her a Young Naturalists Award from the American Museum of Natural History in 2011. Her family had gotten a dog and her mom kept telling her not to let the dog lick her face because dog mouths are full of bacteria. Instead of arguing, Abby decided to find out herself if this was true.

"I hypothesized that human tongues would be cleaner than dog tongues," she wrote. "I thought this because humans brush their teeth at least once a day. I hypothesized that dogs' tongues would be dirty because they were always licking dirty things like garbage."

After diving into the research about bacteria that live in and on humans and dogs, Abby decided she had a testable hypothesis. But this wasn't any old middle school science experiment. She applied for and got a grant to the State Hygienic Lab at the University of Iowa, where she was assigned a mentor to work with her.

You can read the nitty gritty details of her experiment here, but here was her conclusion:

 dogs, dog mouths clean, dog tongues, dog licking, should you let a dog lick your face Many dogs will lick you if you give them the chance. Photo credit: Canva

"I concluded that dog and human mouth flora are very different. (Flora means the bacteria found in a mouth or anywhere else.) The bacteria found in human mouths are more similar to another human's oral bacteria than the bacteria found in a dog's mouth.

I also concluded that dogs' mouths are cleaner than humans' in some ways, and dirtier in other ways. Humans have more bacteria in their mouths than dogs do, based on the total number of bacteria. Most of the humans had a 'moderate' number of bacteria, and most of the dogs had 'few' bacteria. A possible explanation of this might be that dogs pant a lot, and maybe while panting, bacteria falls off their tongues along with their saliva. But dogs had more types of bacteria. The average number of different bacterial colonies in a dog's mouth was about 5.7. The average number of different bacterial colonies in a human's mouth was about 4.1. I think this is so because dogs sniff and lick a variety of things, like carpets, floors, chairs, grass, etc., so they pick up bacteria from many places."

But what about the licking of our faces? That's a bit of a subjective call, but Abby's results gave her some peace of mind:

"In conclusion, will I let my dog continue to lick me? The answer to the question is yes!" she wrote. "I will feel guiltless about letting my dog lick me because I found out that human and dog oral bacteria are different, so my dog's oral bacteria present no harm to me."

 lick, licking, face, dogs, dog puppy love kiss GIF by Pickler & Ben  Giphy  

What do the experts say?

According to Colin Harvey, professor at the University of Pennsylvania’s School of Veterinary Medicine and executive secretary at the American Veterinary Dental College, comparing dogs' mouths to humans' mouth is "like comparing apples to oranges." As Abby found, the microbes in a dog's mouth are very different than those in a human's.

The American Kennel Club elaborates:

"Most of the bacteria in your dog’s mouth aren’t zoonotic, which means you probably won’t get a disease from a big old doggy kiss. There are exceptions to this. Dogs that eat a raw diet are at an increased risk of contracting salmonella, which can be spread to humans. You also probably shouldn’t share kisses with a dog that regularly raids the litter box.

In other words, kissing your dog is less risky than kissing another human, but that doesn’t mean that your dog’s mouth is necessarily cleaner than a human’s—they just have a mostly incompatible set of germs."

 dogs, dog mouths, dog kisses, dog teeth cleaning Keep your dog's mouth clean with regular teeth brushing.Photo credit: Canva

Keeping your dog's mouth healthy through regular teeth cleaning and dental check-ups can also help prevent issues that could potentially come from dog licks.

So there you have it. If your dog doesn't eat a raw diet and doesn't go snacking in the cat box (or some other equally fecal-bacteria-ridden place), their kisses are probably not going to hurt you. Guilt-free pooch smooches for the win!

This article originally appeared in April.

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Joy

Dog mom shares adorable video of the 'chores' her pitbull pup thinks she’s doing

No one can call her a freeloader.

via Stiv XTZ/Pexels

A pitbull stares at the window, looking for the mailman.

Dogs are naturally driven by a sense of purpose and a need for belonging, which are all part of their instinctual pack behavior. When a dog has a job to do, it taps into its needs for structure, purpose, and the feeling of contributing to its pack, which in a domestic setting translates to its human family.

But let’s be honest: In a traditional domestic setting, dogs have fewer chores they can do as they would on a farm or as part of a rescue unit. A doggy mom in Vancouver Island, Canada had fun with her dog’s purposeful uselessness by sharing the 5 “chores” her pitbull-Lab mix does around the house.

The mom says Rhubarb has chores because “we didn’t raise a freeloader.”

Here are 5 “chores” that Rhubarb has mastered.

 
 @rhubarbthedoggo No freeloaders on my watch 🙅🏻♀️ #pittiesoftiktok #dogtiktokers #dogsoftiktok #pitbulllove #pibblelove #pibbles #pibblemixesoftiktok #pitbullmix #dogfluencers #doggotiktoker #dogmomsoftiktok #dogmomlife #dogmoms #dogtiktokviral #dogmomma #prettypitty #prettypittie #prettypitties #dogrelatable #relatabledogmom #relatabledog ♬ Dump Truck(Back It Up & Dump It) - KINFOLK THUGS 
 
 


1. Makes sure the laundry doesn't get cold

Translation: Sits on top of the clean laundry, ready to be folded.

2. Unlicensed therapist

Translation: Gives us kisses when we're tired or feeling down.

3. Supervise repairs

Translation: She gets in the way when you're in a compromised, uncomfortable position with a wrench in your hand.

4. Alerts us when there's an intruder

Translation: Stands at the window and barks furiously at the mailman.

5. Keeps mum's spot warm

Translation: Lays in her spot on her favorite chair in the living room.

The video inspired some funny responses in the comments.

“He’s carrying that household on his back. Give him a raise."

“Obviously the most valuable member of the household."

"Rhubarb needs a little vacation from working so flipping hard!"

"Hardest worker there ever was."

"He's carrying that household on his back."

Here's to Rhubarb, for earning his keep, and being adorable while doing it. It's a tough job, but somebody's gotta do it.

This article originally appeared last year.

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Pets

A young autistic man was scared of dogs. This stray changed everything.

"They were looking for each other."

Canva

A black dog lies on the floor.

Grab your tissues, if there are any even left after the world sees this video.

With Christina Perri's "A Thousand Years" underscoring, we see a young man in pajamas sitting on a bed wearing noise-cancelling headphones. A tail-wagging black dog approaches as the TikTok chyron shares: "POV: Your autistic son was always afraid of dogs until..."

@lifeotspectrum

They were looking for each other ❤️ 🎥: @thecheyenneagains (TT) #autism #therapydog

We see him doing, perhaps, some self-soothing stimming, as he timidly reaches out to pet the dog, but his trepidation pulls him back. It then reads, "A stray dog randomly shows up at your house and changed everything."

As he continues to show interest, but is held back by fear, the dog sits…and waits, "allowing him the patience and time needed to work through his fears." He crosses his arms and the dog…just…keeps…waiting, while carefully sitting close enough to convey that he's safe.

We see a smile from the young man. "Gunner created a safe space and allowed my son to trust," the chyron continues. And then—his smile got even warmer as he bravely reaches out his hand and gently strokes the dog on his head.

 man, dog, petting, love, animals A man and a dog stand near a dock.  Photo by Joseph Pearson on Unsplash  

The music ceases and he now feels more comfortable petting sweet Gunner. The final chyron reads, "Gunner is the best." And if that wasn't heartwarming enough, Gunner the dog turns around, faces the camera and appears to smile.

Originally posted on the @thecheyenneagains TikTok page and then reposted by Life on the Spectrum (@Lifeotspectrum), this video has half a million likes and thousands of comments. It clearly resonates with people in the spectrum community, dog-lovers, and just plain humans with hearts.

One top commenter writes, "Dog understands autism better than 95 percent of people." Another shares how lovely it is to see Gunner show so much patience and understanding. "Gunner read his body language and energy perfectly and said 'it’s ok dude, I can wait take your time it will be worth it.'" Another shares a similar sentiment, "Gunner just knew. What a brilliant dog and probably life-changing for this young man too."

As a follow-up, the OP shares another video of Gunner soothing her son after what she describes was a "tough day." In this clip, she shares that her son's name is Brodey and we see him again gently petting Gunner as the two look at one another.

@thecheyenneagains

Replying to @LuciaR they are so sweet together and Gunner just knows what to do ❤️ #creatorsearchinsights #fyp #fypシ #fypシ゚viral #fyppppppppppppppppppppppp #viral #viralvideo #viraltiktok #autism #autismawareness #dog #dogsoftiktok #dogs #doglover

A commenter here writes, "Some dogs show up specifically to heal a part of your soul," to which the adoring mother writes, "He just loves Brodey."

Another shares the belief that the two are soul-healing: "I love dogs so much. This is amazing. Not even trained service dog, yet knows exactly what your precious boy needs. I think you found his soul dog."

And don't think Gunner isn't getting some great TikTok attention. After what appears to be a run-in with some skunks, he gets a bath and a talking to.

@thecheyenneagains

Gunner thought it would be a great idea to try and mess with a 🦨!!! 😮‍💨😮‍💨😮‍💨😮‍💨😮‍💨 please pray for me #fyp #fypシ #fypシ゚viral #fypage #trending #dog #dogs #dogsoftiktok #doglover #gross #nose #bath #bathtime #clean #baddog

 

Mom asks him, "Are you gonna mess with the skunks again? Was it worth it? No more skunks. Good grief!" A commenter playfully replies, "He absolutely said yes to both questions."

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Pets

The evidence is in and the world has an unexpected 'naughtiest' dog breed

And no, it's not the beagle.

Canva

A beagle gnaws on a boot.

First of all, all dogs are good boys and sweet girls. Let's just start there. But if you want to get kind of scientific about it, the folks at Protect My Paws were ready for the assignment. Turning to Instagram (as all good scientific studies should), they analyzed 87,886 posts and made charts to show the results of which breeds were the best behaved and which, well, were not.

"We counted the posts that mentioned a breed along with a popular behavior hashtag (#gooddog, #cleverdog, #cleverpuppy, #baddog, #naughtypuppy, #cheekydog, #muddydog). And then we balanced the positive hashtags against the naughty ones and looked at where they were geotagged."

First, the good news: according to their findings, the "best behaved dog" is the Korean Jindo dog. This means that, following the Instagram data, this breed had the most positive-related hashtags.

  - YouTube, HappyDogTV_Official  www.youtube.com  

But there's more! They also figured out where the best-behaved (and naughtiest) breeds lived geographically. "Ukraine is the land of good boys," they report, "with 96.72 good boy behavior." Also, nearly all states in the US report more good boy hashtags than naughty. ("Kansas and North Carolina are the only states who vote ‘naughty dog’–and only by a small margin.")

Now for the naughty. According to this study, the naughtiest dog breed is (drum roll please) the Japanese Spitz, with 86.67 hashtags or mentions noting unruly behavior. For those who haven't heard of this breed, they are tiny little white marshmallow fluff-balls who are cousins to the Pomeranians. They note these pooches' "lack of respect for your personal space with a mischievous sense of humor, and you can expect to be clambered over, interrupted, snuzzled, and maliciously cuddled."

They seem to be tiny little adorable Velcro-dogs.

  - Soyabean YouTube channel  www.youtube.com  

According to 2puppies.com, as cute as these little babies are, problems might arise with their suspicion of strangers. They relay, "Despite its small size, it can show aggression towards intruders. The dog chooses only one person in the family to obey without question."

Furthermore, while they seem to be little cuddle bugs, "These animals cannot tolerate the loneliness. If left alone for too long, your Spitz can destroy the interior and scratch on the doors without interruption for hours."

 

Also on the list, according to their naughty hashtags, are the following breeds in order: the wirehaired Vizsla, the Shichon, the Mudi, the Cockapoo (Cocker Spaniel meets poodle), the Chug (chihuahua meets pug), the Shichon, the Poochon, the Welsh terrier, the Keeshond, and the English springer Spaniel. (I will say as someone who watched their beagle attempt to chew the blinds clear off the rod, I was shocked they didn't make the list!)

 beagle, dog, breeds, naughty, pups A beagle sits on a table.   Photo by Anna Kumpan on Unsplash  

The map they share also shows the country with the most misbehaved dog breeds by the research's account. South Africa is number one on this unfortunate list, followed by Slovakia, Singapore, Australia, and the UK. The data is collected by posts showing their dogs being silly little house destroyers.

But dog-lovers, before you breathe a sigh of relief that your dog didn't make the list, there's a slightly newer report out from just this year. The folks at Country Living cite a report made by Many Pets, an insurance company, who sifted through thousands of claims and insights from their customers to come up with the list of dog breed.

Their list is quite different, with one exception. The, as they call it, most mischievous dog breeds are:

Labrador
Cockapoo
French Bulldog
German Shepherd
Cocker Spaniel

 cockapoo, dog, naughty, dog breeds A cockapoo puppy sits in a field.   Photo by Hugo Kruip on Unsplash  

If you cross reference those lists, only one breed makes both and it's… the Cockapoo. So if you've got one of these adorable pups, hide your favorite shoes. Otherwise, you should be fine.

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