no matter what wet food i feed my cat he always has diarrhea, i always transition slow so i know that is not the problem. right now he is on wellness grain free pouches, and bb kitten dry. when i feed him strictly dry his stools are firm, but as soon as i start to add even the tiniest amount of wet to his diet, they become soft and stinky. it doesn't matter what brand of we either, i have tried alot of them and its all he same.