Walky - Dog....they run while we ride the bikes...they wear a harness, attach to the bike, and when we start, they look and sound like the photos of sled dogs waiting to get hooked up...so, so excited. They pull us for the first half of the ride, we often have to slow them down with the brakes and commands....lots of "on by" because of the stupid people on the path that stand with their mouths agape and forget about the dogs on flexi leads....but they absolutely love it. Andy hardly runs...just walks really really fast, and Jack is a galloper, but he has much shorter legs and a stockier build. They are still exhausted. Wish we could do it in the morning before work, and it's not that it takes too long, barely 20 minutes, but they drink so much after, that they pee for the next 2-3 hours. Today Jack didn't even make it to tell us....on his way to the door, couldn't hold it. I felt bad cause it really was our fault. Got him outside, and it was pouring rain, and he really continued to pee for an entire minute!!! That's a lot. They do love to run!!!!