:דברי מיסד הגזע הרועה הגרמני
"Working Lines"

"Take this trouble for me: Make sure my shepherd dog remains a working dog, for I have struggled all my life long for that aim."

-- Max von Stephanitz

For thousands of years, dogs have adapted to serve humans in a mutually beneficial relationship.   While dogs could move quickly, hunt, and protect flocks and owner, the humans could provide food and shelter from severe elements.  Besides tending to the animal's injuries, the human could provide protection from larger predators.
::  A dog's reason for being is to serve humans.  ::