One summer when we had lots of thunderstorms and I bought the thundershirt for Callie and we used it all summer and it worked great. Then after the summer when we had a thunder storm I didn't put it on and she was not scared at all! The thindershirt fixed her
She used to pace, pant, and shake badly. I know the thundershirt will let you return it if it doesn't work. We use it for fireworks too.