A man answers this ad, and goes to the house.

"You have a talking dog for sale?"

"Yes, he's VERY smart."

"Could I talk to him alone?"

"Sure, he's in the next room."

"Can you really talk?"

"Yes."

"AMAZING! Tell me a little about yourself."

"Well, as a puppy I went to guide dog training school. Graduated top of my class. Worked for Stevie Wonder. We used to talk about music a lot."

"WOW"

"Then I went to drug sniffing school. Graduated top of the class, and because I can speak Spanish, they sent me to Colombia"

"You speak Spanish?"

"Si, then 9/11 happened, so I brushed up my Arabic."

"OH MY GOD!"

Man bursts back into the other room.

"Why on earth are you selling that brilliant animal?"

The owner replies "That dog is a bloody liar!"