who feeds their hogs to their dogs?

Weak puppies died, that was just part of life. He truly believed that only the strong and working dogs should survive to insure that the breed would remain strong. He never bred out of a "second" rate dog either. Said if you want good puppies breed the best to the best. Double up on the traits you want and try to minimize the traits you don't. I have been taking his advice for 35 yrs. and its working for me. I think that we might have lost some really good knowledge from the past that came from experience not a book or study done under certain conditions. The studies they used were conducted in real life situations and knowledge passed down from their fathers and grandfathers. If it worked, do it, if it didn't, try something else.