Well, I kind of understand your post, apologizes to Catwalk. The reason is that I saw corn in my son's poop and freaked out. I called the ped nurse and she explained that it didn't digest, and that's why it was in the poop. Now, he was less than a year old, and I was changing his diapers. Your daughter, on the other hand, is 4 years old. Is she not potty trained? If you are still changing her diapers, then you would see whether or not there is corn. But if you're looking in the toilet, you actually wouldn't see it at all. Understand what I'm saying? It could be there, and you woudln't know it.
Either way, you could ask the ped about it.
Dawn