Another surprise to many, is that Federal law prohibits the use of hormones in poultry production.
USDA does not permit the use of hormones in poultry production. Therefore, the label "no hormones added" cannot be used on the labels of poultry unless it is followed by a statement that says "'Federal regulations prohibit the use of hormones." USDA does not allow a "hormone-free" label.
Why are chickens getting so much bigger? Due to advances in breeding, animal nutrition and animal care. Just as apple farmers aim to plant trees that will produce the most fruit, chicken producers also aim to breed chickens that yield the most meat.
You have been bamboozled if you believe the meat you are eating is hormone free. You have been bamboozled, again, if you believe consuming meat with the label "no-hormones added" is inherently indicative of a more nutritious or healthier choice.
Stop being bamboozled.