I have the same problem with Otis. I have bought him a martingale collar, also known as greyhound collar, that acts like slight choke, and he is better, still not perfect but better. Here in the states we have something called a "gentle leader" or a "halti leader", which is like a collar that goes around the dogs snout, thus preventing them from pulling. I haven't gotten that for Otis (yet) but if it keeps up I probably will. The issues with walking young B's on a leash is that they smell and see so many things and they just want to check it out, so pulling is inevitable…until they either get trained not to or a collar/lead that prevents them. We are working on the training, and Otis does OK while I do it in our surrooundings, like yard, but once I take him places where he sees people or other animals, all rules are out the window..