THL had been involved in over 100 campaigns to convince global companies to pledge using only non-
battery cage eggs after a certain date, including
Sodexo,
Mariott International,
Costco,
Grupo Bimbo,
Starbucks,
Compass Group, and
Dunkin' Donuts. The
Open Philanthropy Project wrote in 2015 that "Other leading organizations in corporate campaigns have consistently reported to us that THL plays a key role in these campaigns." Following negotiations with THL,
United Egg Producers—which represents companies that produce 95% of all eggs produced in the United States—announced that it will eliminate the
culling of male chicks by 2020. Chick culling refers to the routine killing of male chicks (which are useless for meat or egg-laying), usually by gassing or grinding them alive. United Egg Producers continued chick culling despite this commitment, stating in 2021 that it was still searching for "an ethical, economically feasible alternative to the practice of male chick culling at hatcheries". In 2021, THL released a report which found that "99% of U.S. store-brand chickens" were afflicted by
white striping, a poultry disease that causes "elevated serum creatine kinase levels, increased fat content in pectoral muscle, gross white striations in the direction of muscle fiber, and hypertrophy of pectoral muscle which are similar to observations in hereditary muscular dystrophy". == Cost-effectiveness and reception ==