Our las dog Junior, made it to 13 before we put him down
Our current dog Rusty is 15 and is showing no signs of the inevitable quick downward spiral and has absolutely no gray hair on his face except a little on his lips or cataracts which in itself is unusual. The only real noticable sign of his age is that he's a bit more boney than he used to be. We spent 2,000 on TPLO (look it up, it's crazy) surgery two years ago for a torn ACL and hematoma surgery on each ear the las one less than a year ago. At the time we were not sure about spending the cash but seeing as he is still healthy, it was well worth it. And not to mention, hes a large breed dog which in general go a little sooner than a small one.
Here's a pic from a few months ago