We have a German shepherd 3 years and half and she swallows (swallow is the term because it does not make a fold) every night before going to bed. After dinner, she post before the cabinet where we store them and do not move until she has had. I do not know to what extent it is effective, it is certain that his breath will never stink. But maybe it is just because she is young? That said, it is his "sweet" evening we will continue just for that. Amazon thank you to offer the program "Save a Subscription" is super convenient and cheaper !!!