A horse rancher had a problem: A school bus stopped at his ranch and kids gave cookies to his horses, which made the horses gain weight day after day.
“Do not feed the horses!”
He put up a sign, but it didn’t work.
One day, a person who studied positive psychology heard about his problem and made a new sign for him. After he put it up, his horses returned to their previous shape—agile with fine, shiny hair.
The sign standing at the ranch read: “We only eat apples and carrots.”