answer:I’d say given his good health status maybe several more, 2–3. 14–15 is getting pretty darn old for a dog. The thing is, just like us people the aging process can remain stable and then progress quickly as age advances. There’s always a jumping off place. My cat is 14, he has changed noticeably in just this last year, developing a thyroid condition and getting rather dotty too. lol I hope he’s around another year or more, of course, but most of my cats have gone between 15–16 on average, dogs usually live a little less long that cats. I hope Michael is around for a long time to come, it’s hard losing our little buds. :-(