Kelp is 10 and is still often mistaken for a pup.
He ran alongside my bicycle when I biked across China a few years ago (I have some poorly-shot footage,) and has gone on countless other adventures - from downhill skiing to white water rafting. He's photogenic, has a lot of energy, and loses weight easily. An adventurer in his golden years, he'll demonstrate that you CAN teach an old dog new tricks, and maybe even get his old physique and pep back. He'll make drastic before/afters.