Disease overview

Occasional bad breath is usually not something you should worry about. However, when bad breath is a persistent problem, it may be indicative of a more serious issue. The most common cause of bad breath is periodontal disease. Different types of bad breath can also indicate general health problems, such as kidney disease, diabetes, and some liver disorders.

How is it treated?

Regular tooth brushing, or the occasional cleaning by a veterinarian can help to minimize bad breath. A veterinarian can help determine if the bad breath is linked to any health problems.

Citations

https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/bad-breath-sign-illness