Hermione avoided meals for going on four days, visiting Minerva that first evening as the Headmistress drank a cup of coffee that she suspected might have been laced generously with firewhiskey. She pled fatigue, and generally not feeling quite well as her reason for staying away and eating in her rooms. Minerva raised a sceptical eyebrow at that, but could do nothing about it; while teachers were expected to attend a certain percentage of meals, Hermione had exceeded that number so far this school year and the Headmistress had no real reason to inquire further. That didn't, however, stop her from doing so.