Wasn’t sure at the beginning however the difference when the first bottle ran out was proof. I cant smell the scent so wasnt sure if it was doing anything but when the first bottle ran out the dog and puppy went back to being Dog – stressed, Puppy too energetic. This product has chilled them out, not totally but enough to have an active but not out of control pet household. Cat seems to come inside more too and chill on sofa, unheard of for the last 8 years!!!!! will definitely be buying again just need one for the kids now!!