What for? why'd you want to know?
It doesnt know that it is called a chicken.
Its a free land. And its born to roam and fly around.
You paved it and call it a road.
It doesnt even know it is called a road.
Where "why" is vital, chicken and road are irrelavent.
Those are prespectives of human mind.
Along those same lines,
Why War? Why Governments?