We are on our 2nd beagle just like yours, I feel your pain! Vazzle was the worst - we were asked to leave pet stores, had all the same comments you get. We took her for private training and that helped a lot. One thing that worked well with both Vazzle and Oliver was using hot dog pieces as training tools. My husband cooks them in the micro and cuts them up in small pieces, and they are only used for training. For Vazzle we used the prong collar (recommended by our trainer) and the hot dogs. Kept her on a VERY short leash and she was rewarded very few feet she moves forward correctly. Oliver isn't quite as bad as she was so the martingale collar works okay for him.