I feed my dog Innova Evo turkey and rice formula, but switched him to the red meat formula for a change and he has had diarrhea. I have since put him back on the turkey mix, but was wondering if anone has heard of giving a dog 1/2 tsp. of plain yogurt to help firm up his stool a bit until his tummy feels better. Does anyone know of anything else that may help him with the runs?