Laying Hen Moulting: Welfare in Flock Renewal

Forced moulting of laying hens through feed withdrawal is banned in the EU but practised elsewhere. Understanding this practice helps evaluate production welfare standards.

Key Facts

Forced moulting induces hens to stop laying and regenerate their feathers, extending productive life by 30-40 weeks
Traditional forced moulting through feed withdrawal involves 7-14 days of fasting — causing significant suffering
EU legislation banned feed-withdrawal moulting — only low-nutrient diet moulting is permitted
The US still practises feed-withdrawal moulting in some states, though some retailers require alternatives
Non-feed-withdrawal moulting using high-zinc or aluminium-based diets causes less acute welfare harm
Moulted flocks show higher salmonella infection rates — a human food safety concern alongside welfare
Some producers choose not to moult and instead replace flocks with new pullets at end of laying cycle

Welfare Considerations

Feed-withdrawal moulting causes severe acute suffering — fasting laying hens for 7-14 days causes hunger, behavioural frustration, and physiological stress equivalent to starvation. Hens denied food show persistent foraging and feeding-related behaviour, elevated stress hormones, and immune suppression. The EU ban on feed-withdrawal moulting reflects the welfare evidence. Where the practice continues, the welfare harm is significant and unjustified given the availability of alternative moulting methods. Consumers who purchase eggs from non-EU producers without equivalent moulting regulations may be indirectly supporting feed-withdrawal practices. Transparency about moulting practices in egg supply chains is a welfare labelling gap that advocacy can address.

What You Can Do

Choose eggs certified to EU-equivalent welfare standards that ban feed-withdrawal moulting
Advocate for feed-withdrawal moulting bans in jurisdictions that still permit the practice
Support transparency requirements that disclose moulting practices in egg supply chain labelling
Raise awareness of forced moulting among consumers who may not know about this practice
Support retailers who have committed to sourcing from non-feed-withdrawal moulting suppliers