I highly recommend Randy Robinson and Bark Busters. I have tried other dog training, including positive reinforcement and shock collar. Bark Busters is so much more effective than anything else I've tried. Randy was patient in explaining everything to me and took all the time I needed. Randy taught me how to communicate with my dog, and the speed at which the dog understands is the difference. Bark Busters uses positive reinforcement, no hurting your dog, but any training has to start with your dog knowing what you want him to do. Using Bark Busters communication method and training structure, I am amazed at the difference in my dog's behavior. Like any dog training, you have to continue to practice it if you want to be effective. Every time I have a question I email or text Randy and he responds the same day.