Antimicrobial resistance (AMR) has been framed as one of the biggest threats to humanity in the 21st century. By 2050, more humans could die because of AMR than cancer. But despite alarming concerns from the early 1960s and warnings that the issue of antimicrobial resistance could cross barriers between animal species, the problems of antimicrobial use in animal farming have for long been ignored by policy makers and the food industry.