Costs of Bulls Versus AI (Drovers Magazine; April 2016) April 21st, 2016 News Many cow-calf producers are asking whether AI or natural service bulls are more cost effective for their herd. Click here to read the full article on Cattlenetwork.com. Share ThisTweetSharePlus oneShareEmail Related Posts Follow ESTROTECT on Facebook & Twitter Get social with ESTROTECT™ Heat Detectors! Like us on our Facebook fan page and follow… “Back Patches Improve Visual Heat Detection” Canadian Cattlemen Magazine (June 2014) After breeding 2,000 cows, rancher finds ESTROTECT™ Heat Detectors a reliable time saver for finding cows in standing heat. ESTROTECT Honors the Life of Stan Lock, an AI Industry Pioneer Sunday morning the AI Industry lost a real pioneer. Stan Lock was a real cowman that understood the science and practical aspects of breeding cattle by artificial insemination. Stan will be missed but his work will go on through his disciples.