“Birds sold as free-range or free-roaming must be given access to the outside, however that is the ony requirement; the area to which they have access may be small, and consist of gravel and no forage of any kind. The term pastured or pasture-raised tends to be more meaningful, as this practice can affect the flavor and size of the birds...The term "natural" is unregulated and essentially meaningless. According to the current USDA standards, no poultry may be given hormones; thus, poultry labeled as "hormone-free" is akin to labeling bottled water "no carbs" or "fat free.”
―
Irma S. Rombauer,
Joy of Cooking