The Wolf and the Sheep
The wolf tries his best to eat the sheep in vain because the dog protects the sheep.
The wolf decides to use a trick to get them.
The wolf sends a messenger to visit the sheep.
The visitor says to the sheep that the dog is the enemy among them,if they can drive away the dog they will live peacefully.
The sheep don't know the wolf's treachery and drive the dog away without any consideration.
Without the protection of the dog,the wolf eats up all the sheep easily.
This is to say:people who have lost their protector would be conquered by the enemy soon.