I contacted Jack as a result of my Boston Terrier who had been exhibiting aggression while on leash over the past year. I had tried another training technique, to no avail and really needed to get the behavior under control. Jack and I also identified some other behaviors that needed to be put in check, so we addressed those first. Within an hour and a half, our dog was a complete gentleman at the door, was no longer jumping up on us and was walking with a loose leash, as if had been doing this forever. The next step was to encounter dogs on leash and use the same techniques we had used to control the other behavior. To my sheer amazement, my dog was completely relaxed and under control with the very first dog we encountered. After a total of 2½ hours, our dog had transformed from a little guy with a lot of uncontrolled energy, which sometimes equated to aggression, to a complete gentleman. We have continued to practice the techniques each day and we have continued to gain more confidence with each outing. The great thing about Jack's training is there are no clickers or treats involved, no shouting, no pleading with the dog, etc. We utilize a strong command voice, with one command word (which seems to be the universal word for mom and dad are in control) and a special collar. In addition, we are coached to offer all kinds of praise when we get the desired response, which is very frequent. All three of us feel really good about our new formed pack. Thank you Jack for helping us out.......and it was so easy!