Doggy Diarrea!!?

My male pomeranian has diarrea. Every morning I feed him "Pedigree Country Stew" In a can. I mean it's not REALLY runny diarrea, but just enough to get stuck on the hair on his . Sorry to talk about something so revulting...I just want to know what I can give him to stop it. P.S. He won't eat that crunchy food in a bag, even if I put it in his soft food. He just goes around it.