CANTON, MA AND WASHINGTON, DC, 2015-12-8 — /EPR Retail News/ — Dunkin’ Donuts, with The Humane Society of the United States, today announced a commitment to source 100 percent cage-free eggs for eggs used in its U.S. menu by 2025. Earlier this year, the company announced its intent to source 10 percent of the eggs for U.S.…