Loose, frequent stools, sometimes oily are a sign that they need more enzymes. DS' stools were fluffy like frosting, not well formed. They tended to be orangish and sometimes greenish. Orange I figure was from his vitamins. They also tended to smell like feta cheese, which I assume was because his primary source of food was milk based formula. When he was potty trained, his stools floated, would leave a greasy ring around the waterline in the toilet. Stools SHOULD look normal if they're getting enough enzymes -- brown, more solid.