Bests & Worsts Reviews from Amazon

I bought these Milk-Bone MaroSnacks previously and my Min Pin (as well as the poodle next door ;) loved them, so I purchased them again and for some reason this time, they are making my dog sick with diarrhea. I just had her to the vet and she got a clean bill of health and she only gets the 'growling stomach' & diarrhea when I give her one of these snacks. I don't know if they changed the ingredients or what?