I have a chihuahua/minpin who is the whiniest dog I've ever heard. My biggest problem with him is that he whines and begs while we're eating. I've told people not to feed the dog, but no one listens to me and keep "accidentally" dropping food. He begs and begs and whines and whines and acts like he's starving and it really annoys me. Does anyone know how I can train the dog not to beg and whine while we're eating?