The transition from battery cages to enriched cages and cage-free systems involves genuine welfare trade-offs requiring careful evaluation of multiple welfare outcomes.
The enriched cage versus cage-free debate illustrates that welfare is multidimensional. Cage-free systems enable more natural behaviours but introduce new risks when poorly managed. Keel bone fractures — now recognised as a pervasive welfare problem in commercial laying flocks — affect cage-free birds disproportionately. The goal should not simply be cage elimination but investment in well-managed cage-free systems that actively address the welfare challenges they introduce, including keel bone fracture prevention.