Hi,
I have never known a dog that this method did not work with. It is excellent as it clearly puts you back in control of the dog as the dominant one in the dogs mind.
Most dogs pull as they are anticipating where they are going and want to get there. The obvious way to stop this is to stop going in that direction. (Be prepared for it to take a little time for the dog to click on to what is happening - another advantage of this method - it gets the dogs brain working. Also you are going to look weird to passers by, normal part of dog training so you will get used to it eventually!) Stop and say,"no". Walk backwards, quickly for about 5 paces patting you thigh and saying the dogs name followed by ,"Heel!" If your dog is already excited by the walk give him a couple of seconds, walk bacwards some more if you have to. As soon as their is no tansion on the lead and you are both facing the same way walk slowly forward again. As soon as he is at the end of the lead repeat the above. The trick is to be consistent, you must do it ALL the time. You may end up going backwards more than forwards at first but as soon as the dog is coming back to heel as soon as you stop add a correction when he begins to pull. This works because to get where he wants to go it is faster to do it your way than to bully and drag you. Your dog will be more aware of you and walks will be much more pleasant, once you get past the looking stupid part! Be consistent and stay calm - you have lost if you lose your temper!