Kings will eat what ever they can that is smaller than them. i can vouch for the king eating corn. When I first started this hobby, I went to a reptile show and got a ghost corn and what I was told was a blizzard/snow corn. I thought the snow looking different then the corns I had normally seen, but the guy told me it was a corn when I asked. When I got them home, being a noobie, I put them together, as they were small. The next day I was short a ghost, and descovered I had an albino king. I was peeved. Anyway, the morals of the story are make sure you know what kind of snake you have, don't house things together, yes kings eat corns.
I have all my reptiles in the same room. I even have a baby king in the same display case as my corns. I generally do not house them right next to each other, though. Because when I did, I noticed the king trying to get in the other cage, through the glass, and "smelling" the air a little more than normal.
I have not noticed any change in behavior on the part of my corns.
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------Misty-------
We have enough youth....How about a fountain of smart?