Bland diet is boiled rice ( white, NOT brown) very lean boiled hamburger( like sirloin), cottage cheese, eggs and broth if needed. If your pup can tolerate chicken boiled chicken is good too.They go on this until the stool is firm, then they are transitioned slowly ( over a 5-7 day period)back to kibble, as long as you don't think it's the kibble causing the diarrhea. With no medical reason ( parasites or bacteria) for the loose stools, I would have to question what he is eating.. So back to basics and add thing one at a time, over a period of days. Any loose stools, back off and try again. It is soooo trial and error with these guys!! Good luck!!