Sarah was in the fertilized egg business. She had several hundred young pullets and ten roosters to fertilize the eggs.
She kept records and any rooster not performing went into the soup pot and was replaced.
This took a lot of time, so she bought some tiny bells and attached them to her roosters.
Each bell had a different tone, so she could tell from a distance which rooster was performing.
Now, she could sit on the porch and fill out an efficiency report by just listening to the bells.
Sa