No, no, no. Time for a talk. If you are able to go talk with them today, I'd pop in for a chat about how you want your son to be as "normal" as possible with this disease and unless he's over X amount, he's ok to eat the snack you provided with a correction. Unfortunately, a 246 is part of type 1. You want him to know how to treat it and move on with his day and not develop food guilt that turns into an eating disorder. I'd also tell them to NEVER make him feel bad over a number! For us, I always say that it's like brushing your teeth...not really fun, but just part of what we must do everyday. It's routine. There is no good or bad. There is no punishment (which as a kid, he'd probably felt punished for not getting a snack), there is no fussing, there is no guilt...especially from people who will not be therre in five or ten years to deal with the fallout of their actions!