Mrs. Koop, have you seen my cat? Dr. Schrodinger and I don't know if he is dead or alive.?
"Mrs. Schrodinger, why would you ever ask me?
C. Everett Koop was appointed by Ronald Reagan as Surgeon General and died February 26, 2013.
Anyway, in a rather lengthy obituary in the New York Times we learn that around age 14:
"… he operated on rabbits, rats and and stray cats in his basement after his mother had administered anesthesia. By his account, not one of the animals died."