Doctor De Soto, mouse and expert dentist, does very good work, curing toothache in animals large and small: his expertise is so great that his lucky patients never feel any pain. He and his able assistant, Mrs De Soto, usually refuse to treat any animals that have a taste for mouse, but one day a fox arrives at his office begging for relief from a rotten tooth. Will the kind-hearted De Sotos turn him away? Or can they make sure that the fox doesn't give in to his hungrier instincts once his tooth is fixed? Those clever De Sotos will find a way. William Steig, award-winning children's author, provides readers of every age with marvellous tips to avoid being eaten by a fox.