When it is time to retest her allergies, her parents pick 6-8 possible allergens to test at that time. They are testing through blood tests once or twice a year. What gets tested depends on what she has been eating and what symptoms she has been having. So, when something has not been tested at one particular time, they continue to assume an active allergy based on prior testing and continue to avoid that food. Some foods are tested more frequently than others (e.g., dairy is tested most...