Consumers can no longer buy free-range eggs in the UK due to the length of time hens have been kept indoors following outbreaks of bird flu.
The eggs in shops will be labelled as "barn eggs" due to birds being kept inside for more than 16 weeks.
The country is experiencing its largest ever outbreak of avian influenza and measures are in place to prevent the virus from spreading.
About 55% of all eggs produced in the UK are free-range, says the RSPCA.
It means they come from birds that, during the daytime, enjoy unlimited access to outdoor pastures.
Signs are now displayed in supermarkets to inform shoppers of the change and free-range labelling will only return when hens are permitted to go outside again.