Looks like its from the same people who manufacture Feliway, which is targeted for cats. I have used THAT with some success. It has helped one large, but rather nerotic cat mellow out on a day to day basis and not be fearfull that he's gonna get jumped by the other cats. It takes about 24-36 hours to kick in for the cats. I CAN tell when it runs out by the change in behaivor of noted cat, so I'd wager the product for dogs will work as well.