An avid duck hunter was in the market for a new bird dog. His search ended when he found a dog that could actually walk on water to retrieve a duck. Shocked by his find, he was sure none of his friends would believe him.
He decided to try to break the news to his most skeptical friend, inviting him to hunt with him and his new dog. As they waited by the shore, a flock of ducks flew by; they fired, and a duck fell.
The dog responded. It did not sink, but instead walked across the water to retrieve the bird, never getting more than his paws wet.
The friend saw everything but did not say a single word.
On the drive home the hunter finally broke the silence, asking, Well, what do you think of my new dog?
The other guy was quiet for a moment, then said, Cant swim, huh?