My first yorkie passed last October at 16 years, 8 months. He got Valley Fever when he was 9 months old and it became chronic so his immune system was trashed. He then had liver issues from the antifungal meds, and in his later years was diagnosed with kidney disease. He was like the energizer bunny and just kept going and going. We finally let him go because his arthritis had become quite painful. Still miss that little guy but he lived a long, full and happy life.
Diana