oh god, for us all the primary signs of our son (5) having eaten gluten are behavioural - obessive behaviour, weeping, screaming, black moods, writhing on the floor, poor sleep - OYE! Other stuff creeps up later. He tests negative with allergy and blood tests though - but we know differently! I asked a similar question on a celiac parents forum and most people said behaviour was a primary symptom.
9/26/07 at 6:03pm