Cóilín is the scientific adviser to the Alliance to Save Our Antibiotics, an alliance of 67 member organisations co-founded by Compassion in World Farming, the Soil Association and Sustain to campaign against the overuse of antibiotics in livestock farming. He has co-authored numerous reports on antibiotic resistance and antibiotic residues that highlight the human-health impact of excessive antibiotic use in intensive livestock farming. The Alliance’s work aims to encourage a move to more responsible use of antibiotics in farming, through better regulation, voluntary actions and improvements in production systems, which would also improve animal health and welfare.