Doctor de Soto by William Steig. Doctor De Soto is a well-respected mouse-dentist who runs a successful practice with his wife (and able assistant) Mrs. De Soto. The De Sotos are friendly and professional toward all their patients, from chipmunks to donkeys to cows, the exception being "cats and other dangerous animals," as stated clearly on the sign outside the office. But the De Sotos are tender-hearted rodents, so when a miserable fox shows up begging for treatment, they agree to have a look (perhaps against their better judgment). As it turns out, this fox, with "a rotten bicuspid and unusually bad breath," manages to behave himself while tiny Doctor De Soto is standing mid-molar inside his gaping jaws. When the wily fox returns the next day to get his replacement gold tooth, however, he has mouse-flavored snacks on his mind. Luckily, Doctor De Soto and his wife have anticipated such despicable canine intentions, and find a way to outfox the ungrateful fox.
Paperback, 32 pages.