I know this is a popular subject but I have tried so many things. My boy Harley (9 mon) has very soft stool, so soft it is very hard to clean up. We have changed food 3 time and it has not worked. We started out with Nutro, went to Canidea, and now we are on Innova. We do put a table spoon of yogurt in his food at his morning feeding and a little tamato juice in the evening (yogurt for gas/tamato for lawn spots) they both work great. I think the next thing to do is stop the yogurt and tamato. Anyone have a idea on this one?