Our Grandson has a 115# Rottweiler that would drag his girl friend where ever he wanted to go so I took the dog for a walk. I held him beside me on a short leash about three feet long. Whenever he would pull it would lift his front feet off the ground. Within a couple hundred yards he was walking with me without pulling. I never heard if the dog remembered his lesson. I think dogs may know when they can be the boss. Our Pit would drag my wife, so I told her I'd teach him how to go for a nice walk. He would walk out front with a slacked leash. Nothing to teach. My wife isn't able to go for walks anymore and I can use a little help on an upgrade so his little pull once in a while isn't too bad. I don't discourage it... ;)