My DS three times this week has gone to eat his muesli bar and its been gone from his lunchbox. It happened again today and I know for certain I put it in (the others days I thought I had but couldn't really be sure). It's his treat in his lunch box and doesn't come home and ask for another just says it was gone again. I don't think he is trying to pull a fast one on me.
Is it something I can mention to the teacher or too meddling? I try not to get too involved unless its serious stuff.