I have to confess there were doubts that anything would have a calming effect on my dog, but this product really works. It's not a "sedative" so don't expect your dog to chill out completely at the vet or at the groomers, but it certainly seems to lessen his stress. I also pump a couple sprays on him before our walks and we both can now have calm conversations, instead of stern corrections, as we get our daily exercise. I'm 66 years old, so who knows, the Calm My Dog Essence could be working on me too (LOL). I do keep a good supply on hand -- wouldn't want to run out of it!