My lo has some pretty stinky ones too, especially now that I am switching her over to formula, turning green and lumpy...
But I still don't think she has anything on her daddy! j/k
But really, sometimes her fluffs smell just like an adult fluff! Totally different from her poopies, that is how I usually tell if there is something behind it. I wonder if different formulas make it smell worse too. I thought I read a post a while back saying that good start is great, but just stinkier than others.