The global transition away from battery cages is one of the most significant animal welfare developments of the 21st century. This update reviews where we stand in 2025 — the gains made, the setbacks, the ongoing debates, and the road ahead.
Laying hen welfare has been the focal point of the most successful animal welfare campaigns in history. The combination of legislative bans, corporate procurement pledges, consumer campaigns, and international trade pressure has driven an unprecedented shift in the egg industry over the past two decades. Yet the work is far from complete — billions of hens remain in cages globally, and even "cage-free" systems have significant welfare limitations.
The EU banned conventional battery cages in 2012, requiring transition to enriched colonies or cage-free systems. The EU's Farm to Fork Strategy and subsequent legislative process has targeted a complete cage ban by 2027 — covering enriched cages as well as conventional ones.
The US has seen dramatic growth in cage-free commitments through state legislation and corporate pledges, but implementation has been slower than announced timelines.
The UK banned conventional battery cages in 2012 (along with the EU, when still a member). Post-Brexit, the UK maintained these standards. UK retailers have been relatively proactive — all major UK supermarkets now either stock only cage-free or have announced cage-free commitments. The UK's Lion Code (egg industry quality mark) requires compliance with UK welfare standards.
Australia has been notably slow on cage reform compared to Europe and North America. Conventional battery cages are still legal in most Australian states. Victoria has announced a phase-out; ACT has banned cage eggs. New Zealand banned battery cages in 2023 — a significant milestone for the southern hemisphere. National phase-out campaigns continue in Australia.
Asia houses the majority of the world's laying hens, with China alone having approximately 3.5 billion hens. Cage welfare reform has made very limited progress in most Asian markets. Japan has seen some corporate retailer cage-free pledges from international brands with Japan operations. South Korea has growing consumer awareness. India, China, and Southeast Asian nations remain almost entirely cage-based with no significant legislative movement toward reform as of 2025.
The cage-free transition has sometimes obscured an important truth: cage-free is not the endpoint — it is a necessary minimum. Cage-free systems vary widely in welfare quality:
| System | Key Features | Main Welfare Concerns |
|---|---|---|
| Multi-tier aviary (cage-free) | Multiple levels, perches, nest boxes, litter floor | Keel bone fractures; floor density; air quality |
| Single-tier barn (cage-free) | Floor litter, nest boxes, perches | Similar but fewer keel fractures |
| Free-range | Outdoor access (8m² EU minimum) | Population range use; predator pressure; seasonal access |
| Organic free-range | Organic feed, higher space standards | Variable — better in well-managed systems |
| Pasture-raised | 108+ sq ft outdoor per hen (US Humane Farm Animal Care standard) | Best welfare in commercial systems; scalability questions |
One of the most significant welfare issues in cage-free systems is keel bone fractures — injuries to the sternum (keel bone) that are extremely common in laying hens across all non-cage systems. Research suggests that 50-80% of hens in cage-free aviaries experience keel bone damage during their productive life. Causes include collisions with perches during flight, falls, and physical impacts. Keel bone fractures are associated with pain, reduced mobility, and reduced productivity.
Injurious feather pecking — where hens peck at and damage other hens' feathers and skin — remains a significant welfare problem in cage-free systems, especially at higher densities. Conventional cage systems avoided the problem by denying hens the space to perform it. Cage-free solutions include: providing adequate enrichment (especially litter and dustbathing substrate), maintaining appropriate flock sizes and densities, beak trimming (controversial), and selecting for lower-feather-pecking breeding lines.
Every laying hen system must address the male chick culling issue: male chicks from laying breeds cannot produce eggs and grow too slowly for meat production, so they are killed — by maceration or CO2 — at one day old. This represents approximately 7 billion male chicks killed annually worldwide. Two alternatives are advancing: