What percentage range of dogs and cats presenting to a veterinarian have periodontal disease?

• A. 50-60%
• B. 60-70%
• C. 70-90%
• D. 90-100%

Answer: (C)

Periodontal disease is one of the most common conditions seen in small animals, so a large majority of dogs and cats seen by veterinarians have some form of dental disease. By adulthood, many pets accumulate plaque and tartar, leading from gingivitis to more advanced periodontitis if left untreated. In veterinary dentistry references and practice data, the prevalence in the clinic population typically falls in the 70–90% range, reflecting how widespread periodontal involvement is among patients presented for care.

That’s why the best choice is the 70–90% range. It captures the high frequency without overstating that every single patient has disease, which isn’t the case—there will be some healthy mouths, especially in younger animals or those with excellent dental care. The lower ranges underestimate how common periodontal issues are in routine veterinary practice, while the very top end says nearly all animals are affected, which isn’t universally true.