The second-largest fast food chicken chain in the United States is moving towards eliminating antibiotics in its poultry. The company doesnt provide statistics for how much chicken it uses per year, but in 2010 it sold over 282 million chicken sandwiches. To make the changeover, the company says it will be working with its suppliers — which include Tyson, Perdue, and Pilgrims Pride — and the United States Department of Agriculture (USDA) to make sure that no antibiotics are used anywhere in the process, from the hatchery to the processing plant. Overuse of antibiotics has long been a concern to experts, scientists, and activists alike, and animal husbandry accounts for over 80 percent of all antibiotic use in the US, according to a recent report from the Johns Hopkins Center for a Livable Future.