A Businessman's Idea 商人的主意
A family moved from the city to the suburbs, and were told they ought to get a watchdog to guard their house.
So they bought the largest dog available from a near-by dealer.
Shortly afterwards the house was broken into at night by burglars while the dog was asleep. The householder went to the dealer and told him about it.
"Well, what you need now," said the dealer, "is a little dog to wake up the dog."