Welcome Dennis. These yorkies have very sensitive tummy's as I also found out. Boiled white meat chicken and white rice should do the trick in a couple of days then add his regular food slowly back. I do not know his size but my vet also said I could use 1/2 tblt of pepto bismol for the upset stomach and diahrea. Give before meals. I smached mine up and put it in his mouth. My yorkie is 13lbs I would use 1/4 if he is smaller. If it continues have him wormed by the vet. There was one time nothing showed up in the stools but vet suggested a possible male parasite. They do not show up in the stools because there are no eggs to lay. In less than 24hrs. he was his old self again. Good luck. Carol |