Ahhhh, a common problem! I walked a Humane Society dog in our city's St. Patrick's Day parade, and she pulled very hard for the entire 2 hours. It took me weeks of chiropractor treatments and deep massages before my aching shoulder got better.

I have a really silly suggestion. Would it be possible to have someone drive you and your dog to the location at which you usually turn around and head for home? I wonder if he'd still pull. Might be worth a try. I know that dogs have a wonderful sense of direction, so he probably would know that you're heading back home.

We occassionally have hunting dogs come onto our property. I have often retained them, placed them in a pen, fed and watered them, and called their owner to let them know we have them. (Hunting dogs here are required by law to wear a special license.) I'm amazed by the typical response of "Why did you do that? He would have eventually found his way back home."