I have a one year old English Lab puppy named Hank that was out of control! He was getting so strong i was not able to take him on a walk without a major hassle. Pulling, bolting not listening. In comes Brittany K9 Harmony to the rescue! The e- collar training is just what he needed. He is not all the way to bright yet, but improving every day. It takes consistency, daily walks and Brittanys gentle touch. Highly recommend!