DS was formula fed and he's pancreatic insufficient, so needed enzymes. I remember the nurses in the NICU telling us the goal was for well formed stools -- not greasy or shiney. And when he was briefly put on pregistimil (predigested formula) what came out was grass green and well formed. Weirdest color combo I'd ever seen. And the nurse looks at it and said it was perfect?!! Hello?
The poop issue drove me nuts. As long as they're stooling on a regular basis and it's not greasy, shiny (malabsorbed), has mucus, he should be fine. And even if that DOES happen, it's not that big of an issue -- just a sign that he's eating something different, might need enzymes... DS' really didn't have normal looking stools until he started drinking regular milk and eating normal table food.