DD has always done this weird thing where she lays on her side and tenses up, and kinda grunts and breathes heavy. We've always thought it was her dealing with some kind of stomach discomfort but haven't been able to tease out exactly what it is or what causes it. She did it when she was breastfed, and still does it now that she eats "normal" food. The pediatrician has said maybe it's her just feeling the food move through her intestines. I'm worried it could be something in her diet causing discomfort. If your LO has a gluten sensitivity, what do their symptoms look like?