Americans eat more chicken — 92 pounds per person in 2017 — than anyone else in the world, according to the National Chicken Council, a Washington, D.C.-based lobbying group that represents the largest poultry suppliers in the country. But the chicken meat they consume comes from birds that are heavier, and sped to market much faster, than in previous decades. Chickens in the U.S. that are raised for their meat, known as broilers, grow to an average market weight of more than 6 pounds, more than twice as large as in 1955, and the entire process takes place in 23 fewer days.