On the basketball court at recess, there was a new girl that cat and rabbit both wanted to be friends with. Her name was zebra. Cat becomes friends with zebra but then says not nice things about rabbit and tells zebra not to be friends with rabbit. Zebra does not take well to being told not to be friends with rabbit, and walks away from cat, telling her she is not nice. Zebra becomes rabbit's friend because rabbit tells zebra, "You can be friends with anyone you want." Zebra liked the sound of that. Don't try to get a friend by being mean. 
Be nice! 