One Smart Dog?
Two dog owners were bragging about the intelligence of their pets.
"The brightest dog I ever had," said one, "was a Great Dane that used to play cards. He was a whiz at poker, but finally a friend complained about him and I had him put to sleep."
"You had him put to sleep, a bright dog like that? A dog like that would be worth a million dollars."
"Had to", he replied, "Caught him using marked cards."