Well actually, he's just on the walk. He started trying to walk over the 4th of July holiday. Then he got sick for a week and gave up on the walking. But as of a few days ago, he has really started to take off.
He also had his 15-month check-up today. He got rave reviews. :) His stats are 22lbs 2oz (25th percentile) and 31" in length (50th percentile). Doc says to love him, feed him, and spoil him. I think we can manage that.