My Chase is super scared of thunderstorms too. I got the Thundershirt, and had my first chance to try it Wednesday. It made a HUGE difference. Before the shirt, the smallest rumble of thunder would cause him to shake and pant. With the shirt, he shook a tiny bit for less than a minute (and the storm was 4 hours, at least!), didn't pant at all, and just layed down! It worked great for him
