Is a dogs mouth cleaner than a humans?

The notion that a dog’s mouth is cleaner than a human’s is widespread, but how valid is this claim? In this article, we will analyze the factors influencing oral hygiene in both species to uncover whether there is any validity to this popular idea.

Is a dogs mouth cleaner than a humans? - mouth, dog -

Exploring the Bacterial Composition of Dog and Human Mouths

The types of bacteria in mouths play a significant role in oral health. Dogs and humans harbor a diverse microbial community, but some key differences exist. Due to their high-pH saliva, dogs tend to have fewer cavity-causing bacteria like Streptococcus. However, based on diet, dental care, and more, bacteria levels can vary substantially between individuals. The bacterial composition alone does not confirm whether dogs or humans have better oral hygiene.

Oral Hygiene Practices and Habits in Humans

Humans have developed advanced dental care routines to maintain good oral health. These include regular brushing, flossing, professional cleanings, dental check-ups, and using products like toothpaste and mouthwash. Adopting healthy dietary habits by limiting sugar intake also promotes oral hygiene. With proper practices, humans take active steps to care for their teeth and gums.

Oral Hygiene Factors in Dogs

Most dogs do not receive daily brushing or professional dental cleanings. However, some natural mechanisms in dogs aid oral health. Their saliva contains antimicrobial compounds to fight bacteria. Chewing toys and treats also help clean teeth mechanically. Anatomical differences like sharper teeth and higher saliva pH may inhibit bacterial overgrowth. Still, without proper care, dogs can develop dental problems.

Comparing Oral Hygiene in Dogs and Humans

Humans utilize more sophisticated hygiene practices like brushing, flossing, and professional cleanings. Dogs rely more on natural cleaning from saliva and chewing behaviors. Both species are prone to oral health issues if dental care is neglected. While humans take more direct actions for dental care, dogs benefit from innate mechanisms.


Ultimately, the notion of dogs having cleaner mouths than humans is still being determined. Humans have better access to dental products and procedures for maintaining good oral hygiene. But dogs possess some natural advantages that aid oral health, like antimicrobial saliva and teeth designed for chewing. Proper dental care practices make the most significant difference in oral health in both species. The popular belief overlooks key factors on both sides. While intriguing, the claim that a dog’s mouth is cleaner than a human’s does not seem fully supported when all the evidence is examined.

Jennifer Barker

I'm Jennifer. My passion for dogs lead to this blog's creation in 2014. I share tales of life with my pups and insights on natural dog care so fellow pet parents can nurture the joy and wellbeing of their furry friends.

Comments (2)

  • Adriansays:

    20/08/2023 at 23:55

    Dogs have a unique oral microbiome that helps maintain their dental health. While their mouths may not be “cleaner” than humans in the conventional sense, they can still be healthy when well-maintained through proper dental care.

  • Ellissays:

    21/08/2023 at 00:46

    It’s fascinating how dogs have natural antimicrobial properties in their saliva that help keep their mouths cleaner. However, it’s worth noting that good oral hygiene is essential for both humans and dogs alike.

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