Duck Food

One day a convenience store worker was sitting not doing much. At 2 o'clock the doors swing open and a duck walks in.

"Do you have any duck food?" the duck asks.

"No we don't got any duck food."

"Okay, thanks anyway", says the duck, and walks out.
The next day at 2 o'clock the doors swing open again, and the same duck walks in.

"Got any duck food?" he asks.

The clerk is a little annoyed "No! We don't have any duck food!"

"Fine." the duck says and walks out.

The third day at 2 o'clock the doors swing open and the duck walks in and asks "Got any duck food?"

By now the clerk so getting very annoyed: "No" he yells "We don't have any duck food! We didn't have any yesterday won't don't have any today and we wont have any tomorrow! And if you come in here again and ask if we have and duck food I'll nail your little web feet to the floor!!!!"

All the duck does is turn and walk out the door.

On the forth day at 2 o'clock the doors swing open and the duck walks in:

"Got any nails?" the duck asks.

"No we don't got nails."

"Well then," the duck says "got any duck food?"