Malodorous breath is most consistent with dental disease, a common health problem in dogs within this age range. However, certain oral tumors can grow in the mouth and lead to tissue destruction, infection, and subsequently also cause malodorous breath at this advanced age. If you still seek further information, please visit our Ask The Vet page to submit a one on one consultation with a licensed veterinarian 24 hours a day, 7 days a week.
Common tumors of the oral cavity:
Epulis
Fibrosarcoma
Osteosarcoma
Melanoma