I realized that we let the kids have a snack way too late, and his siblings cut up the servings. His portion was just as big as the others and he didn't even finish it (that should have been a sign right away). Of course none of this crossed my mind at 2 am when he crawled into bed with us. He wasn't moaning or anything and I figured he'd fall asleep and I'd take him back to bed.
oops
It reminded me of a Bill Engvall line that was something to the effect of "That's when I realized somebody oughtta make an alarm that sounds like a kid puking. Cuz there ain't NO snoozing when you hear that!"