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Dr. Harold Katz

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Whose Mouth Is Cleaner, Dogs or Humans?

Posted: 03/07/11 08:13 AM ET

Have you ever been told, "A dog's mouth is nine times cleaner than a human's"? It's a common statement or wives' tale that gets thrown around every now and then, mostly by one of the many dog lovers in their attempts to comfort friends that don't enjoy having their faces licked.

According to the 2009/2010 National Pet Owners Survey, 62 percent of all U.S. households own a pet. That is about 71.4 million homes just in America alone. The majority of these pets are dogs, closely followed by cats. These pets are often more than just animals but considered more as a member of the family.

But is this cleanliness statement one of fiction or fact? Well, let's think about this objectively. Most humans brush and floss their teeth two to three times daily, and don't eat out of the trash or drink out of the germ-covered toilet. Can we say the same for dogs? It really depends on their owners.

The logic is simple: the healthier the dog, the cleaner the mouth. For you dog owners out there, there are many things you can and should do for the health of your dog. Dogs need our help to be healthy. They can't brush their teeth on their own, or drive themselves to the vet.

Did you know that gum disease is the most diagnosed problem in dogs and cats? This nearly always leads to tooth loss. Once this happens, it may become difficult for your pet to eat and this may result in a deterioration of his health. This is because gum disease (gingivitis or periodontitis), like in humans, if left untreated can cause tooth rot and decay. This means that your pet can actually start losing teeth, making it very difficult or painful to eat anything. And unlike humans, dogs don't have dentists that can do root canals, fill cavities or put crowns on their teeth. If these procedures are possible and you are lucky enough to find a surgeon, these procedures would no doubt be very expensive and difficult for your dog to go through -- especially if he is older.

A side effect of gum disease is foul smelling breath or "doggy breath." It's true that a dog's breath depends on factors such as diet, but hygiene can really be the main culprit. Rather than just ignoring your dog's bad breath, it would be better to treat it. After all, you would treat yourself if you had bad breath, right?

Before reaching four years old, 80 percent of all dogs and 70 percent of all cats will show signs of dental disease. And just as in humans, when oral bacteria has access to interior organs through open gums, more serious health problems such as heart, lung and kidney disease may follow -- not to mention oral odor that is no fun to be on the receiving end of. That could cause some worry about the cleanliness of your dog's mouth -- so it's best to avoid poor oral health altogether.

Keeping your four-legged friend healthy will ensure the cleanest mouth possible.

How do you keep your dog's mouth (and the rest of him) healthy?
• A well-balanced, meat-based diet is important
• Take your dog to the vet regularly and keep up to date with vaccines
• Brush your dog's teeth on a regular basis or use an oral rinse (available in pet stores and online).
• Maintain routine oral hygiene visits to the vet or groomers
• Give him treats to chew on that will help remove plaque from his teeth
• Regular exercise or some type of physical activity would be beneficial, just as it is for humans, but of course this varies by breed and dog.
• If his breath is very bad, consider using an oral solution made for dogs and cats that help with bad breath

While good pet care is vital, the bottom line is that it's a myth: generally speaking, a dog's mouth is not cleaner than a human's. But this doesn't mean that it's a danger to have your dog lick you or that you should shy away from having the healthiest dog possible. Your dog is dependent on you and you are ultimately responsible for his health and well-being.

Where did this myth come from? In an AbCNews.com article, veterinarian and author of Chicken Soup for the Dog Owner's Soul , Marty Becker believes he knows. He believes that it comes from the practice of a dog licking its wounds. "And they'll [dogs] be licking that wound and you'll notice that the wound heals very fast... what that tongue does is it gets rid of the dead tissue". It's similar to when we have surgery and the wounds are cleaned out.

So the next time Spot wants to show his affection, you can fully enjoy the love without worrying about the germs. And do your best to keep his mouth healthy, so he can be around for many years to come.

 

Follow Dr. Harold Katz on Twitter: www.twitter.com/therabreath

Have you ever been told, "A dog's mouth is nine times cleaner than a human's"? It's a common statement or wives' tale that gets thrown around every now and then, mostly by one of the many dog lovers i...
Have you ever been told, "A dog's mouth is nine times cleaner than a human's"? It's a common statement or wives' tale that gets thrown around every now and then, mostly by one of the many dog lovers i...
 
 
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HUFFPOST SUPER USER
Rodrockler
The dark side clouds everything!
08:25 PM on 03/13/2011
Still didn't answer the question!!!
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HUFFPOST SUPER USER
onwisconsin
Trust women; protect choice.
11:54 PM on 03/11/2011
We started brushing our pup's teeth daily when he was a wee puppy. He's now a huge dog and 23 months old. He insists on getting his teeth brushed before bed every night. He'd like to have them done in the morning too but I give him a "chewy" to work on instead.

None of my dogs have ever lost any teeth and most of them have lived to ripe old ages (one exception due to inoperable cancer). Another key is to not give them people food with sugar. They don't need it and it only does them harm.
01:24 PM on 03/10/2011
dont feed your pets anything with flour or sugar in it, or anything that has a shelf-life. Come to think of it, the same goes for humans.
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HUFFPOST SUPER USER
lee4
PetFinder... Adopt don't shop!
08:42 AM on 03/10/2011
I was hospitalized with a very serious infection from a cat and had a lot of different specialty doctors tending to me. I asked, and each doctor told me the same thing, of the three, the worst bites are: human, cat, then dog.
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HUFFPOST SUPER USER
onwisconsin
Trust women; protect choice.
12:27 AM on 03/12/2011
My dad was bitten by a cat last year and immediately had a reaction that was so bad his hand was twice its normal size. He was given some IV antibiotics in the ER and it still didn't work. He went back the next day, at my mother's urging, and finally was given the correct mix of medications that worked to target the infection.

He still feeds the neighborhood cats. They live on the edge of a wooded area and people dump cats there all the time. He hates to see them go hungry. I think, however, that he is more careful about trying to mediate arguments between two of them like he did when he got this bite.
07:54 PM on 03/07/2011
It depends entirely on who the human is; I know some humans whose mouths are certainly dirtier than my dog's mouth.
HUFFPOST SUPER USER
healthanalyst
Banned from commenting, so?
05:23 PM on 03/07/2011
Cats can give an incredibly bad infection in their bites. Especially if its deep or in a joint. You need to see a doctor for antibiotics ASAP. Same with dogs. Though dogs aren't as bad.

You start swelling or seeing red lines radiating from the bite areas, really get to the ER fast. You need IV antibiotics. And the swelling will be a really red puffing up. You'll know it.

Been there done that. Used to foster cats.
03:20 AM on 03/08/2011
Between cats, dogs and humans, cats win the bad news award hands down. They commonly carry the bacteria Pastuerlla Multiceda, a relative of the deadly bubonic plague bacterium Pastuerella Pestus, known by the common name cat bite fever or cat scratch fever. It spreads extremely rapidly and if it goes systemic can cause death in hours.
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HUFFPOST SUPER USER
lee4
PetFinder... Adopt don't shop!
09:04 AM on 03/10/2011
Not according to all the specialty docs that tended to my very serious infection, from a cat, when I was hospitalized. Of the three, human bites are the worst, then cat, then dog.
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HUFFPOST SUPER USER
exPatPatti
Eyes Wide Open
04:06 PM on 03/07/2011
My dog has a cleaner mouth than most kids these days.
HUFFPOST COMMUNITY MODERATOR
JScott
John Galt's last name is McGuffin-Smithee
04:01 PM on 03/07/2011
Yup and don't forget cats either their mouth is prett foul, and stinks, We had a cat when growin up she lost all her teeth and could only gum down wet food, or soggy dry food.
HUFFPOST SUPER USER
electricladyland
Don't censor me bro.
02:46 PM on 03/07/2011
I would say that people who french-kiss their dogs have the lowest oral hygiene.
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NevadaLib
pwning cons since 2007
02:45 PM on 03/07/2011
I brush my dogs teeth (and get made fun of for it)
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JoliAvocat
Barack Obama in 2012
06:15 AM on 03/08/2011
Don't pick those people as friends. Without dental care dogs have teeth that rot and can even get an infection in their jaws or brain! It's a very smart thing to do. More to the point, it's educated to realize they need what we need in this dept.
08:22 AM on 03/08/2011
"Don't pick those people as friends"

Lol thats a bit much
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HUFFPOST SUPER USER
onwisconsin
Trust women; protect choice.
11:58 PM on 03/11/2011
I'll fan you for it because I do the same thing. As a matter of fact, I'm about to go do it right now.
HUFFPOST SUPER USER
RFlo
01:52 PM on 03/07/2011
my dogs mouth is still cleaner than humans, but he needed some serious dental work. the vet said to feed him dry food instead of wet, its better for them.
01:42 PM on 03/07/2011
Any advice on how one would actually brush their dog's teeth. I attempted it and it was no bueno!
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HUFFPOST SUPER USER
pushabutton
03:18 PM on 03/07/2011
think that's bad, supposedly you are supposed to clean a cats teeth too. Can't be done with out either chloroform or serious blood loss
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JoliAvocat
Barack Obama in 2012
06:17 AM on 03/08/2011
Generally you have to start brushing them when they are puppies and get used to it. They are startled if all of a sudden you put something forceful into their mouths. Do not EVER force them. They will remember it as a bad thing and never want to do it again.
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aceshigh11
Nowhere is the dreamer or the misfit so alone
01:14 PM on 03/07/2011
My fwuffy wittle doggy...he's SOOO cute!!
HUFFPOST SUPER USER
deminmo
just looking for answers
01:05 PM on 03/07/2011
The dog's.
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HUFFPOST COMMUNITY MODERATOR
Hollywooddeed
Bagger, please.
09:33 PM on 03/07/2011
Yeah.
12:58 PM on 03/07/2011
The vast majority of the bacteria living in the mouth of a human or dog is species specific and cannot live in the mouth or body of the other. However you do need to worry about the parasites commonly found in dogs mouths. Dogs are the definitive host for a variety of parasites which can infect you if your dog licks your face. If your dog ever eats the carcass or offal of a ruminant (deer, sheep, cow, etc) it has a very good chance of picking up a nasty worm which upon entering a human can encyst more or less randomly in body tissue; if it ends up in the central nervous system it can be fatal