An internist, a surgeon and a radiologist go duck hunting. There aren't any ducks, so they start bragging about their dogs. Finally they decide to have a contest.

They put down a chocolate chip cake. The internist points to the cake and says to his dog, "Sic it, Osler!"

Osler trots to the cake, takes out a notebook, and writes down all the ingredients, in descending order by concentration. Then he carries the note back to his master and wags his tail.

"Good boy, Osler! Impressive, huh?"

The surgeon snarls and says to his dog, "Get it, Halsted!"

Halsted runs over, takes out a scalpel, divides the cake into equal sections, dissects out all the chocolate chips and puts them in a container to sent to pathology. Then he goes back to his master.

"Good dog, Halsted," the surgeon says smugly.

"You haven't seen anything yet," says the radiologist. "Okay, Roentgen!"

Roentgen runs over, eats the cake, screws the other two dogs, and gets home by 3 o'clock.