I have "seen", defined as first hand knowledge, corn snakes eat mice, rats, chipmunks, parakeets, chicks, gerbils, goldfish, eggs, crickets, lizards, hatchling snakes, moles, voles, salamanders, button quail, African Soft Coated Rats, substrate of all kinds and fingers. Okay, so the last one didn't count because they spit it out. LOL This does not mean all those "food" items are appropriate. Even humans eat things that are not acceptable food items. It's called Pica and is considered a problem. In all honesty I could eat goldfish too but I probably wouldn't thrive on them.
Terri
PS - Where in IL are you from?