I have a puller on leash, but he actually needs to pull more in harness. Go figure. But I will stop and not allow him to go forward until he is at my side. We just don't move ahead. He gets where he's going when he does it right. This can be a big pain. Sometimes I do use a head halter, but I have never used one in a guide harness, only when he's out of a guide harness and not guiding. Christy