The golden era of useful antibiotics may be coming to an end, due in large part to the overuse of antibiotics in CAFOs (confined animal feeding operations). CAFOs, otherwise known as “factory farms,” are all about raising farm animals faster, bigger, cheaper. To sustain their unnaturally concentrated and large populations of livestock, CAFOs rely heavily on antibiotics. Now, the newest research out of China reveals that the overuse of subtherapeutic antibiotics as growth-promotants on CAFOs is creating antibiotic resistant superbugs — strains of bacteria that do not respond to antibiotic treatment.