Bigwig US grocer Wal-Mart Stores Inc. has revealed in a Tuesday announcement that it has efforts underway to phase out the sale of eggs from caged hens, at US Wal-Mart and Sam's Club stores, by the year 2025.

The announcement underscores Wal-Mart's commitment to supply 100% cage-free eggs by the mentioned timeline.

The announcement made by Wal-Mart makes it the biggest and most prominent food retail chain to set a deadline for switching to cage-free eggs; especially after some other big grocery stores -- including Albertsons, Kroger, and Supervalu -- have also announced similar commitments of late.

The decision by leading grocers to completely transition to a 100% cage-free egg supply by 2025 scores a highly noteworthy win for individuals and organizations supporting animal rights and sustainability.

Asserting that the 2025 goal for transitioning to 100% cage-free egg supply is based on "available supply, affordability and customer demand," Wal-Mart's chief sustainability officer Kathleen McLaughlin said: "Our commitment to transition to a cage-free egg supply chain recognizes that expectation and represents another step we are taking to improve transparency for food we sell in our US stores and clubs."