Too much of a good thing

Lately Carl has been complaining to us after he eats that his stomach hurts. He groans and mopes arround the house then dramatically lays on the couch holding his stomach. We ask him all sorts of questions as to why ect and he always says he doesn't know. Today I gave each of the kids a hot dog for lunch with celery sticks, which is a treat for them, and went upstairs to finish my workout while Missy watched over them for lunch. A while later Carl comes upstairs moaning and groaning about his belly. I asked him what was wrong and he again said he did not know. Ha-Na came running in asking if they could eat a piece of their easter candy (after easter it gets put away and rationed). I asked them if they had eaten all their lunch and Carl says "I tried but I could not finish." I thought this to be odd considering he eats more than anyone in the house. Then he says "I just couldn't finish the fourth one". "Fourth what?" I asked. He then goes on to tell me that after he had finished his lunch I had given him he asked and received more hot dogs from missy and finally stopped at four. Carl does eat a lot, well after each of us finishes dinner he continues. I had to then have a talk with him that the purpose of eating is to be satisfied not stuffed till we burst or in his case moan and groan for an hour. It amazes me that all that food fits in his little body. Again tonight he was his usual self, he had two helping of chicken, three helpings of pasta and four helpings of salad, and that was where I stopped him. If he is eating this much now I am scared to see him as a teenager.