Iron deficiency is the world's most prevalent micronutrient deficiency, affecting over 1.5 billion people. Existing interventions — supplements, fortification — fall short on adherence, bioavailability, and reach. Iron Bird is using endogenous genome editing to increase the bioavailable iron content of chicken muscle to beef-equivalent levels, turning the world's most consumed meat into a meaningful nutritional vehicle — without requiring any change in consumer behaviour. No feed additives. No exogenous sequences. A trait encoded in the genome, propagating through commercial breeding lines at scale.