I have heard the same thing but i also hear SOOOO many good thing about Wellness and I like that it is alittle higher in protein then Natural balance ( NB 23 grams & Wellness 28 grams). And looking on the grading scale it scored 5stars where NB scored 4 stars..Aghhhhhh IT's DOG FOOD!!!! It's driving me nuts...lolol..But I guess if it's giving her dierrhea then it's out.