13-year-old Tricia has been picking at her food, double-checking the calorie count of everything she eats, leaving a lot of food uneaten on the plate, and sometimes refusing to eat at all. She was never heavy to begin with, but her mother now thinks she looks at least 10 pounds lighter. She suspects that Tricia might have an eating disorder but she isn’t sure. What is the most important thing for her, and other parents in similar situations, to do first if they suspect their child has an eating disorder?