Since the mid-20th century, the livestock and poultry industries have seen advances in several areas including nutrition, genetics, engineering, veterinary medicine, and management, all of which have enhanced feed efficiency, growth performance, and meat yield. Dr Winston Samuels of Maxx Performance Inc & Dr Wayne Greene, professor at Auburn University, explain how there has been a clamour of calls from industries to focus more on how animal agriculture affects the environment and overall food safety.