My Pit mix had to be on vitamins continuously, or he would, ummm, "snack". He used to gobble up my other dog's mess all the time as a puppy, and we tried the "Forbid" and the Adolph's meat tenderizer, and it made him eat both my other dog's mess! Well, he LIKED bitter apple, so who knows what the deal was with that. Finally, I got a bottle of "Pet Tabs" vitamin and mineral supplement, and decided to see what might happen if I gave them to him for a while. After about two weeks, we began to see him start passing up on the "snacks" long enough for us to clean it up first, and after a month, he totally stopped "tasting" as we walked around the neighborhood. As long as he took the vitamins, he didn't do it at all, but if I tried to stop them, in about two weeks, he started getting interested again. We just went and kept him on then for the rest of his life.