She very well could be getting cross-contaminated at the lunch table although she purposely requests no nuts in her lunch so she can eat at the less crowded peanut-free table. We did a 504 plan for her which I could update to have her sit separately although that's a tough call based on the social aspect of elementary school.
I'm certain she's not experimenting due to peer pressure (not that type of kid at all). I do likely need to explore dairy or other intolerances more... hence that food log that I've been talking of starting but haven't yet done. I've seen apps for that, anyone use one? Maybe I'll ask that on one of the general boards.
Thanks for your input!