 my first dog mahalo oh it's the greatest golden retriever he would shake we tried everything and i whatever the vets told me it doesn't matter nothing worked he would shake he was such a brave awesome dog but he would shake when he heard the fireworks and you put the vest on him it did not work whatever the wrap him in the special blanket i mean who knows how much money we spent trying to figure out what can we do with him and the answer was nothing just wait it out