He is happy. I know he may not look happy in this picture, but I promise that he is. I know he is happy because he got to come with me on a run for the first time today.
He was really excited for the first half mile or so, but after a few tugs on the leash he fell right beside me and was a fantastic running buddy for the rest of the run. It was only three miles and at a pretty leisurely pace (for me - he was pretty beat at the end). I think I've found a new training buddy, at least when I'm not going long or doing speedwork.