 Screening: Only subjects who are still making at least a small amount of detectable insulin will be eligible for this study. To determine if a child is still making insulin, they will undergo a mixed meal tolerance test. This involves placing an IV in the morning prior to eating. The subject then drinks a mixed meal the nutritional supplement Boost is usedand blood is taken via the IV at timepoints over the next 2 hours to determine if insulin is still being produced. 