Space allowance is one of the most studied and contested aspects of layer hen welfare. Evidence consistently shows that current legal minimums in many countries are insufficient for hens to express natural behaviours.
Space allowance is not merely a number — it determines whether a hen can perform natural behaviours including wing-flapping, dust-bathing, foraging, and social navigation. At densities approaching legal minimums, hens are physiologically crowded: they cannot avoid persistent aggressors, cannot access feeders and drinkers without competition, and cannot rest undisturbed. The welfare science is clear: above approximately 6-7 hens per square metre, welfare indicators deteriorate significantly regardless of housing system. The challenge is that lower stocking density increases production costs and egg prices. Consumer willingness to pay for higher-welfare eggs — and corporate commitments to welfare standards — are the primary market drivers of improvement in the absence of stronger regulation.