They get the occasional scrap of meat or piece of fruit, but all meals invariably contain a bread product: an undercooked dinner roll, a burnt piece of toast, an old pastry...
She gives whatever it is to a fellow prisoner and he gives her a day-old copy of the Daily Prophet he somehow managed to get himself.
Every night, she scans each page carefully. There is never anything worth starving herself over. But she knows that tomorrow there will be.
Rod gives her a biscuit he has apparently been saving. "Hungry?"
"Starving." She answers honestly and pockets the food for another purpose.