I have to agree with the above. I would say that your poor little Corn was so stressed out over his trying new placement, than over the size of the food he was given. I suggest just keeping an eye on him, keep him warm (but give him a place to escape to a cooler side of the tank) and leave him alone for a week. Let him get back to being comfortable before you handle him and try to feed him again. As for the question on his morph, from your picture I'd go with a normal striped, but I'm definitely no pro on Corn morphs.