I forgot. I run with a harness on them. I guess people would say running far is bad. I run marathons and ultrmarathons and some people would say what I am doing is bad for my body but I bet you I am a lot healthier than a couch potato. So, I think running the dog he is getting exercise, doing something that he loves, and you just might find a love for it too. Most cities usually do a funrun 5k with you and your dog. I never suggest running without a leash. If you can, run on the grass or dirt. Running on asfault isnt very good for you or your dog. You might want to practice on a track.