My husband has been using this device on our one year old black Lab with great results. After using this for one month, our dog now is able to come when called and does not go further than my husband allows and when he disobeys, it only takes a small shock to make our dog obey. This truly is a life saver for I know our dog would more than likey get hit again by another car if we allowed him complete freedom. He was hit by a truck after escaping our deck and running onto the road and after costly surgery he is back to normal.
With restrictions, our dog will be safe and will also have lot's of room to run on our farm without having to go onto the road and have another accident happen.