Hilton Worldwide is to implement new measures to improve the welfare of animals in its global food supply chain.
The hospitality company said it would begin to eliminate the use of cages for egg-laying chickens and gestation crates for breeding pigs.
All hotels in the Hilton Hotels & Resorts, Waldorf Astoria Hotels & Resorts, Conrad Hotels & Resorts, Canopy by Hilton and DoubleTree by Hilton brands, will ensure that chickens are not confined in cages by 31 December 2017.
By the end of the year after that, all pork products will have to come from suppliers that house breeding pigs in groups, rather than gestation crates.
The changes, announced in conjunction with the Humane Society of the United States, will initially apply in 19 countries and will be adopted in other markets as supply becomes available.
They are part of the company's global responsible sourcing strategy, which includes a focus on animal welfare. Last year, Hilton announced a global ban of the sale of shark fin in all owned and managed properties.
Jennifer Silberman, vice president, corporate responsibility for Hilton Worldwide, said the company was committed to addressing key issues throughout its business and supply chain.
"With more than 2,000 restaurants in our global footprint, our goal is to have a considerable impact on sustainable sourcing in our industry as well as drive humane treatment of animals throughout our supply chain," she said.