My Border Collie, Sully, developed a severe storm phobia at 2. I've tried everything in the last four years and NOTHING has worked. A friend mentioned she was looking at the supplements and I decided to order the Calming.The day they arrived Sully got one and he slept right through a thunderstorm. This is a dog that paced, cried, dug in the closet and was completely inconsolable. To be honest, I didn't really believe it was the Calming at workSeveral months and many thunderstorms later, I am a huge believer in this product. Sully has no reaction to storms now, and I love that it is non sedating.Thank you WinPro for this fantastic product