[yorkietalkjilly]

I agree with everyone above.

You can never teach a frightened dog anything but fear. If he's stressed enough, he can develop pancreatitis and diarrhea among other medical problems but the psychological damage you are doing by scolding to the point of his shaking is just as problematic as it can cause a lifetime of strange behavior, timidity, fear-aggression and continuing stress-related physical ailments. Study all that you can on how to become a proper trainer - the positive-reinforcement techniques for training. For example, if he messes up, say "uh on" during training; and "No" if he is misbehaving chewing on something he shouldn't, trying to dart out the door or trying to steal candy from the coffee table candy dish and then redirect him to what he should be doing. A happy dog is a healthy and much more rewarding companion.