The guy goes into the backyard and sees a nice looking Labrador
retriever sitting there. "You talk?" he asks.

"Yep," the Lab replies. After the guy recovers from the shock of
hearing a dog talk, he says "So, what's your story?"

The Lab looks up and says, "Well, I discovered that I could talk
when I was pretty young. I wanted to help the government, so I told the
CIA and they had me sworn into the toughest branch of the armed services
...the United States Marines ... you know one of their nicknames is "The
Devil Dogs".

In no time at all they had me jetting from country to country,
sitting in rooms with spies and world leaders; because no one figured a
dog would be eavesdropping. I was one of their most valuable spies for
eight years.

The jetting around really tired me out and I knew I wasn't
getting any younger. So, I decided to settle down. I retired from the
Corps (8 dog years is 56 Corps years) and signed up for a job at the
airport to do some undercover security, wandering near suspicious
characters and listening in. I uncovered some incredible dealings and
was awarded a batch of medals. I got married, had 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.

"Ten dollars," the guy says.

"Ten dollars? This dog is amazing! Why on earth are you selling
him so cheap?"

"Because he's a liar. He never did any of that stuff, . He was in
the Air Force!"