This guy sees a sign in front of a house "Talking ...

This guy sees a sign in front of a house "Talking Dog for Sale." He rings the bell and the owner tells him the dog is in the back yard. The guy goes into the back yard and sees a mutt sitting there."You talk?" he asks."Yep," the mutt replies."So, what`s your story?"The mutt looks up and says, "Well, I discovered this gift pretty young and I wanted to help the government, so I told the CIA about my gift, and in no time they had mejetting from country to country, sitting in rooms with spies and world leaders, cause no one figured a dog would be eavesdropping. I was one of their most valuable spies eight years running."The jetting around really tired me out, and I knew I wasn`t getting any younger and I wanted to settle down. So I signed up for a job at the airport to do some undercover security work, mostly wandering near suspicious characters and listening in. I uncovered some incredible dealings there and was awarded a batch of medals. Had a wife, a mess of puppies, and now I`m just retired."The guy is amazed. He goes back in and asks the owner what he wants for the dog. The owner says "Ten dollars."The guy says he`ll buy him, but asks the owner, "This dog is amazing. Why on earth are you selling him for $10?"The owner replies, "He`s such a liar."