Being curious, the guy goes to the address and knocks on the door.

A man opens the door and the guy answering the ad says, "So, I hear you have a talking dog you're selling for $20?"

The owner says, "Yep."

The guy asks to see the dog and the owner tells him the dog is in the living room by the fire. The goes into the living room and sure enough, he sees the dog, in a bath robe sitting in a rocking chair doing a crossword puzzle and watching the news. The dog looks up and says, "Hi."

The guy says, "Holy shit! It's true, you're a talking dog!"

The dog says, "Yeah, I guess."

The guy asks, "Well . . . why are you just sitting here and not out in the world making money?" The dog says, "Well, you know, a long time ago I used to teach other dogs how to be seeing-eye dogs for the blind, which was rewarding but I needed different challenges so I trained to be a bomb sniffer and worked for the NYPD for quite a while. That wasn't as exciting as I thought, so I helped the police sniff out drugs as well. Found out I was a pretty good at tracking things in general so I got into duck hunting with some guy I worked with, and he eventually entered me into some competitions and I just kept winning so I spent 3 years on tour. That, of course, lead to my 2 years on the breeding farm - which was pretty cool but then there was that whole 9/11 thing and I was recalled to active duty and spent a lot of time retrieving bodies. At that point I figured as long as I was back in New York, I might as well help out so I continued to work in vice sniffing out drugs up until about a month ago. I don't know what happened, I just needed some time off. You know what I mean? Just needed to kind of reflect on things, figure out what I want to do next, that kind of stuff. You know what I'm saying?"

The guy says, "Uh, sure. I mean, Wow! That's amazing!"

The owner walks into the room and the guy asks him, "Why in the world are you selling this dog?"

The owner replied, "Because he's a fucking liar!"