re: People that run with their dog....

When running, my lab's head is always a little in front of me. As soon as she falls a little behind, it's time to let her rest. Most I've done is about 2.5 miles with her. Not that she couldn't do more, but I don't run with her all that often. Yesterday I worked with her doing 150 yard retrieves for about 30 minutes, then ran a mile. She didn't really seem all that tired after. Granted it was the perfect temperature outside.