Outdoor access and ranging behavior in hens improves multiple welfare indicators but requires management attention to ensure all birds benefit and not just dominant individuals.
Outdoor ranging opportunities for laying hens provide important welfare benefits including physical exercise, environmental complexity, and behavioral diversity associated with positive affective states. However, the welfare benefit of 'free-range' depends critically on how many hens actually utilize the outdoor range. In large flocks with sparse or unattractive range areas, the majority of birds may never go outside, receiving no welfare benefit from the theoretical outdoor access. Range quality - including vegetation cover, tree shelter, and absence of predator pressure - determines uptake rates. Monitoring actual range usage rather than simply providing access is essential to ensuring that free-range certification delivers the welfare benefits it implies. Outdoor hens with good range quality consistently show better welfare outcomes across multiple indicators.