Multinational supermarket chain, Carrefour, headquartered in France is applying a spectrophotometric system to differentiate between hatching eggs with male or female embryos developed by the AAT Group.

Carrefour is committed to both welfare and sustainability and has a history of innovation.  Eggs derived from non-GMO diets were introduced into 2010, antibiotics were abandoned in 2013 and winter gardens for hens reared on pasture were introduced in 2018. 

In the past year Carrefour imposed block chain technology on 1,200 supply farms in France.  Carrefour markets 1.4 million dozen eggs under private label, 80 percent of which are produced by non-caged hens and 20 percent reared on pasture using winter gardens under specific brands.