Once, there was a dog who wandered the streets night and day in search of food. One day, he found a big juicy bone, and he immediately grabbed it in his mouth and took it home. On his way home, he crossed a River and saw another dog with a bone in his it's mouth.
He wanted that bone for himself, too. But as he opened his mouth, the bone he was biting fell into the river and sank.
That night he went home hungry.