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 great at poker, but finally a friend complained about him and I had to get rid of him."
"You got rid of him, a bright dog like that? A dog like that would be worth a million dollars."
"Had to," he replied, "caught him using marked cards."