Both my kittens (both have unexplanable diarrhea) have been on a brand to vet sold me, the kind for cats with digestive conditions, diarrhea, vomitting, etc. To detect any allergies and such. Now the bag is almost empty and I wanted to switch to something else, because it says on it not to feed for more then 10 weeks. Do any of you know of a brand of food that's VERY easy to digest for sick kittens? I heard that it should have like one kind of protein and things like that..any suggestion?