A man walks into a bar with a small dog on a leash. The bartender looks at the dog and says, "Sorry, we don't allow pets in here."
The man replies, "Oh, he's not just a pet, he's a talking dog! Watch this."
He turns to the dog and asks, "What's on top of a house?" The dog barks, "Roof!"
The man then asks, "How does sandpaper feel?" The dog barks, "Rough!"
Finally, the man asks, "Who was the greatest baseball player of all time?" The dog barks, "Ruth!"
The bartender is impressed and allows the man and his talking dog to stay. As they're sitting at the bar, a third man comes in and sees the talking dog. He can't believe his eyes and asks the man if he can buy the dog for $500.
The man agrees and sells the dog to the third man. The bartender is shocked and asks the man why he would sell such a talented talking dog.
The man replies, "Because he's a liar! He said my wife was a great cook and she can't even make toast!"