Has anyone tried a thundershirt for your dog? My large lab has some anxiety issues that have gotten progressively worse over the last month. She's getting very destructive when we leave when before she was fine being left alone for several hours. We're not really sure what has changed. If anything, she's alone LESS now that it's summer. We are thinking of buying a thundershirt, and they get good reviews on Amazon for the most part, but I'm hoping one of you has personal experience with it.