Let Sleeping Dogs lie

I was in the backyard hanging the laundry when an old, tired-looking dog wandered into the yard. I could tell from his collar and well-fed belly that he had a home. But when I walked into the house, he followed me,
sauntered down the hall and fell asleep in a corner. An hour later, he went to the door, and I let him out. The next day he was back. He resumed his position in the hallway and slept for an hour.

This continued for several weeks. Curious, I pinned a note to his collar:

"Every afternoon your dog comes to my house for a nap. "

The next day the dog arrived with a different note pinned to his collar:

"He lives in a home with 9 children - he's trying to catch up on his sleep."