I’ve been using Calm Doggy Spray for over a year on my 9 yr old Shar Pei. I spray him a few times as soon as thunderstorms are evident and now he is a lot calmer. He used to shake and fret to the extent I thought he would have a heart attack. I also spray him before taking him to the vet. The vet has commented how calm he is now compared to how distresed he was previously