It works! My two little Shih Tzu puppies actually stopped their disgusting poop snacking. Coprophagia, the name for this habit, was actually causing them a problem. It was giving them diarrhea. I have had to purchase a second package, and am in the process of phasing it out. I mix it with a dab of canned food and give it to them before their morning and evening kibble.. That way I control the exact amount consumed. BTW fresh pineapple tidbits, a recommended alternative to try did nothing to discourage my little Coprophagia poop snackers.