Tyson Foods, the nation’s largest producer of chicken, announced last month that it has begun to produce all of its fresh chicken free of antibiotics and is selling the chicken in grocery stores under a "Raised Without Antibiotics" label. An estimated 70 percent of all antibiotics used in the United States are regularly added to the feed of livestock and poultry that are not sick—a practice with serious consequences for our health. Bacteria that are constantly exposed to antibiotics develop antibiotic resistance. This means that when humans get sick from resistant bacteria, the antibiotics prescribed by doctors don’t work.
From the Union of Concerned Scientists in the USA