Comment to 'why do dobermans seem weak?!?!?!'

    Certain aspects of natural selection like the rigid cull system of breeding based on working ability would produce similar results.

     Actually, not quite. Natural selection is simply just that "natural". Meaning that there are no input by humans and nature does the culling and selecting of the strongest most virile animals. The ultimate expression of survival of the fittest.  There are a couple aspects the play a major role in the outcome.. that is environment and function - all natural which is difficult to achieve in civilization.