One day, a friendly cat and a friendly dog were playing together. They liked to run and jump in the park. They were very happy friends.
But then, they saw a big ball. Both the cat and the dog wanted to play with the ball. They began to fight over the ball. They were not friendly anymore.
Suddenly, the cat fell down and got hurt. The dog felt sad and stopped fighting. An ambulance came to help the cat. The cat and the dog became friendly again, and they promised to share the ball.
