Laying Hen Aviary System Welfare Outcomes

Evaluating the welfare benefits and challenges of aviary systems for laying hens transitioning from cages.

Key Facts

Aviary systems provide hens with perches, nesting areas, litter access, and multi-tier space for exploration
Cage-free aviary systems have dramatically better welfare outcomes than conventional battery cages
Challenges in aviary systems include keel bone fractures, dustbath competition, and floor egg laying
Well-managed aviary systems with appropriate stocking density achieve much better hen welfare than any cage system
Pullet rearing in similar systems to the laying environment reduces aviary welfare problems in adults
Consumer demand for cage-free eggs is driving the largest structural welfare reform in livestock production history

Welfare Considerations

Aviary systems represent genuine welfare improvement over battery cages despite their own welfare challenges. Hens in aviaries can express natural perching, dustbathing, nesting, and foraging behaviors that are entirely impossible in cages. The welfare problems in aviaries — particularly keel bone fractures — are real and require active management, but they represent challenges within a system that allows natural behavior rather than problems caused by the system design itself. The ongoing corporate cage-free commitment fulfillment represents the most significant aggregate welfare improvement in farmed animal history when it reaches full implementation.

What You Can Do

Choose cage-free certified eggs as a minimum and higher-tier certifications where available
Support Open Wing Alliance tracking corporate cage-free commitment fulfillment
Advocate for cage bans in remaining jurisdictions where battery cages are still legal
Recognize aviary management improvements as an ongoing welfare priority alongside the cage-free transition