Highly recommend. We have been treating our small Shtzu/Maltese cross dog for several weeks. He is about 90% less stressed when we have to leave him alone at home. He used to pace, lick, pant and scratch up the carpet if left alone for a few hours. Now i can distract him with music and 'hide the treats' until we get home. He's less reactive to thunder too. We had previously tried anxiety collars, but this supplement has been noticeably more effective for our dog.