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Pawfect Smile Dental

Periodontal Disease in Pets: The Stats Every Owner Should Know

Updated June 22, 2026 · Pawfect Smile Dental

Quick Answer

Periodontal disease is the most common health condition in adult pets: roughly 80% of dogs and 70% of cats show signs by age three, according to the American Veterinary Dental College. Left untreated, it causes pain, tooth loss, and bacteria that can affect the heart, liver and kidneys. Regular cleaning and home care dramatically reduce the risk.

Dental disease isn’t a minor cosmetic issue — it’s the most common health problem veterinarians see in adult pets. Here are the numbers that make the case for prevention.

The headline statistics

  • ~80% of dogs show signs of periodontal disease by age three (American Veterinary Dental College).
  • ~70% of cats show signs by the same age.
  • Periodontal disease is the #1 most-diagnosed condition in adult dogs and cats.
  • Small and toy breeds are at especially high risk due to crowded teeth.

Why it’s about more than teeth

Periodontal disease starts as plaque, hardens into tartar, and inflames the gums. From there, bacteria can enter the bloodstream and place added strain on the heart, liver and kidneys. In other words, a clean mouth is part of whole-body health — not a vanity project.

Why so many pets are affected

The main reason is simple: most pets never get regular dental care. Plaque begins hardening into tartar within about 48 hours, so without brushing or cleaning, buildup is almost inevitable.

What the numbers mean for you

The flip side of these statistics is encouraging: periodontal disease is largely preventable. A combination of home brushing and routine professional cleaning keeps the vast majority of pets out of the at-risk group.

  • Brush most days of the week
  • Schedule a professional cleaning every 6–12 months
  • Get an assessment at the first sign of tartar or bad breath

Don’t let your pet become a statistic. See how anesthesia-free cleaning works or book an assessment in the Bay Area.

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