My friends dog litterally has a mind of his own on how he wants to be trained. If he barks, wonders, or disobeys, all mu friend has to do is rattle the keys and he obeys her. We really don't know why but it seems to work. Maybe it's the sound! He is an Australian Shephard that is 7 yrs old and very smart and lovable.
I have a little kitten that's 5 mnts old and he's a Flame Point Balinese/Manx. Oh, what a hotty he is and he knows it too. He does back flips when he's not flipping his toys, he'll tap you with his
Often, the only think that is needed to get a dog to obey is a sound that will break their fixation and bring their attention back on the owner.
The problem with most dogs is that they get drunk with distractions. This is why food-lure training seems to work so well. It creates a situation where the dog can direct its full attention towards the owner. When we have this attention, BINGO! All dogs become superstars.
Trainers have been instruction dog owners to shake things for years. The most common suggestion is an empty can full of pennies. But I have also seen trainers use keys, bags of marbles, hand claps....