Larry your barking up the wrong tree. I have traveled with your grazing mentors. I know the arguments better than you. I have heard the seminars directly from their mouth while in motel rooms or at dinner tables. Call the Padlock Ranch . Tell them you can not only tell them which cows are bred but you can sex the offspring and tell them which will raise the biggest calf . They will laugh you off the phone. Then dial up the King. After they tell you your full of hot air call the Deseret.Turn around and call the Pitchfork, Circle A, Braseco, they will all tell you that they use ultrasound for their pregnancy detection and scales to find out which cows raise the heaviest calves. If I am so stupid I am in good company.