It didn't work
For my dog, not only did it not calm her down, but it actually made her behaviour worse. As soon as I put it on, she started getting anxious from smelling it, which at first didn’t worry me because the same thing happens with anti-parasite collars in the first few days. But as time went on, her anxiety and barking just got worse, to the point where I had to take it off and saw that she was much calmer without it. Ten unbearable days and money down the drain.