Each bird lives in a space the size of a sheet of paper and never sees the sun. Their beaks are trimmed and they endure constant stress as they lay around 470 eggs in a 100-week period. Spain, along with Portugal, is the European leader of the so-called “furnished-cage” system: 82% of hens are in cages, compared to the average of 52% in the European Union. Indeed, in Germany, Austria, the Netherlands and Sweden, caged hens make up just over 10% of the total.

The egg industry is resisting this change because it is more profitable to keep hens in cages

Since 2016, these four countries have been backing alternative systems such as free-range eggs, where the chicken is allowed to live in larger spaces, and ecological production, where the birds live outside freely and are given organic feed. The consumer can identify the differences according to the number stamped on the egg – zero for organic, one for free-range eggs, two for indoor and three for furnished cages.

Spain is also slowly moving toward more animal-friendly systems. Alternative egg production jumped from 7% in 2016 to 17.6% in 2018, according to the Spanish Egg Producer Society (Aseprhu). In other words, around five million hens have escaped furnished cages.

María del Mar Fernández Poza, the head of Aseprhu, says the drop is thanks to the big distributors who have decided not to buy eggs from caged hens. According to the animal-rights group, the Animal Equality Foundation, six of Spain’s seven national supermarket chains – with the exception of Dia – have publicly committed to protecting animal welfare. “If you are restricting the sale of [caged] eggs, you are conditioning the customer to buy what you put in the supermarket,” explains Poza. Ester Muñoz Gil, the head of external relations at Guillén Eggs, one of Spain’s largest farms, says that all egg production is set to be cage-free by 2025.