Probably this is my biggest pet peeve as a mother!!! While my son is only cutting about 7 lbs this year, he cuts by eating my lunch and not the schools, dropping all snacks etc. Last year they had a BBQ lunch at the school, he gained 5 lbs in one day because of it. Coming into practice the day before weigh in 5 lbs heavy lets say is not a good idea!!! Coaches tend to be a little angry and you tend to run alot and get out of practice late. We've since made the deal that he has to eat healthy and what I fix during the week and then on day he wrestles he gets to determine the meal on what he has been craving.
My advise, stay away from the carb heavy school lunches.