Social hierarchy management in poultry flocks is a significant welfare challenge, with aggressive pecking causing injuries that range from minor to fatal in poorly managed systems.
Injurious pecking in poultry represents a welfare cascade: management systems that do not meet behavioral needs — adequate space, enrichment, appropriate lighting, stable social groups — create conditions where redirected pecking behavior escalates to serious injury. Once tissue damage occurs, the attraction of other birds to the wound creates a self-sustaining welfare emergency. The conventional management response — beak trimming — treats a symptom rather than the cause, and creates its own welfare costs through the acute and chronic consequences of beak tissue removal. Welfare-centered flock management addresses the behavioral drivers of injurious pecking rather than relying on physical modification of birds to tolerate inadequate environments. Lighting management, enrichment provision, appropriate stocking density, and prompt removal of injured individuals address causes rather than symptoms.