"I could use something to nibble." Magica admitted, walking out with Scrooge.

The kitchen was clean, but that didn't mean it was perfectly polished. Like the rest of the mansion, there were plenty of broken and missing pieces, left the way it was due to lack of supplies or lack of care. Their refrigerator was an actual ice box, but at least it was well stocked with fresh vegetables and gutted fish. The pantry had about two loaves of bread, various jams and jellies, and a small box of sweet pastries for special occasions - and despite it not being one, Magica was choosing that for her meal.

It appeared that the twins being this thin wasn't a family trait, but what happened under the cruel circumstances.