I was riding down a popular route when I hear the pitterpat of paws coming up behind. I look be hind and there is this 50-60 lb Lab/pit Bull mix on a leash pulling his owner, who was coasting on a hybrid. I was doing 12-13, and they passed me doing over 15. That dog was getting into it.

On the flip side I see guy's take their dog out on the bike and be pulling the dog to keep up.