I just wanted to update that I finally bought one of these for my Maggie last year. She was terrified of storms. Just the sound of rain on the roof would start her anxiety and when thunder/lightening were involved she was totally consumed with fear. I really didn't think the Thunder Shirt would help her since her phobia was so intense but I tried it and it works! Every time I knew that a storm was possible, I put on the shirt nice and snug. At first she continued to be fearful but almost immediately it had the desired effect and she was calmer. Eventually I did not need the shirt. We recently went through a long period of no storms, so when one started a few weeks ago, I put the shirt on her for one night. She slept right through all the noise and lightening flashes. Haven't needed it since.
Joan