Enriched colony cages replaced barren battery cages across the EU in 2012, but welfare advocates and researchers debate whether they provide adequate welfare improvements.
Enriched colonies represent a step forward from battery cages but remain substantially below the welfare standards of aviary and free-range systems. Hens in colonies cannot fully open their wings, engage in natural foraging, or use resources freely due to competition at shared facilities. The industry characterises them as a practical compromise, while welfare advocates argue they are insufficient.