Stages of Periodontal Disease

Periodontal Disease is the most common disease in dogs and cats.

85% of adult pets have periodontal disease. Bad breath begins in early stages of periodontal disease.

Periodontal disease is an infection of the tissues that surround and support the teeth that can result in bone loss and eventually tooth loss. It is typically a result of poor oral hygiene. Bacteria from dental disease can spread throughout the body and damage the liver, kidneys, and the heart.

Stage 1


  • The gum (or gingiva) at the top of teeth is inflammed and swollen.

  • Plaque covers the teeth.

  • Treatment can reverse the condition.

Stage 2

Early Periodontitis

  • The entire attached gum is inflamed and swollen.

  • The pet's mouth is painful, and bad breath is noticeable.

  • Professional treatment and home dental care can prevent this from becoming irreversible

Stage 3

Moderate Periodontitis

  • Infection and calculus are destroying the gum- now bright red and bleeding. 

  • The pet's mouth is sore, which can affect eating and behavior.

  • Periodontitis has started and may be irreversible.

Stage 4

Advanced Periodontitis

  • Chronic bacterial infection is destroying the gum, teeth and bone. 

  • Bacteria may be spreading in the bloodstream throughout the body, which can damage the kidneys, heart and liver.

The good news is that periodontal disease is easy to prevent. Taking care of your pet's teeth can be easy and rewarding. There are several options to help improve your pet's dental health. Click here to learn more.