Gathering chickens

The farmer's son was returning from the market with the crate of chicken's his father had entrusted to him, when all of a sudden the box fell and broke open. Chickens scurried off in different directions, but the determined boy walked all over the neighborhood scooping up the wayward birds and returning them to the repaired crate. Hoping he had found them all, the boy reluctantly returned home, expecting the worst. "Pa, the chickens got loose," the boy confessed sadly, "but I managed to find all twelve of them." "Well, you did real good, son," the farmer beamed. "You left with seven."