It is truly amazing sometimes how intelligent some canines are. Dogs can be trained to fetch slippers, guard homes, and jump onto couches, at only the sound of a master's voice.
Subservience is found from more than just pets.
The story is told that a few centuries before Christ a man named Alexander and a small company of soldiers approached a strongly fortified walled city. Alexander, standing outside the walls, raised his voice and demanded to see the king. When the king arrived, Alexander insisted that the king surrender the city and its inhabitants to Alexander and his little band of fighting men. But Alexander offered to give the king a demonstration. He ordered his men to line up single file and start marching.