An old tired-looking dog wanders into a guy's yard. The dog does look like he has a home, but he soon follows the man into the house, goes down the hall, jumps on the couch and falls asleep. The man thinks it's odd but lets him sleep. After about an hour, the dog wakes up, walks to the door, and the guy lets him out. The dog wags its tail and leaves.

The next day, the dog comes back and scratches at the door. The guy opens the door, and the dog comes in, goes down the hall, jumps on the couch and falls asleep again. The man lets him sleep. After about an hour, the dog wakes up, walks to the door, and the guy lets him out. The dog wags its tail and leaves.

This goes on for days. The guy grows really curious, so he pins a note on the dog's collar: "Your dog has been taking a nap at my house every day."

The next day the dog arrives with another note pinned to his collar: "He lives in a home with four children -- he's trying to catch up on his sleep. Can I come with him tomorrow?”