Hormones help animals grow, reproduce, and maintain the body’s daily functions; therefore, any animal product, from meat, to milk or eggs, contains naturally-occurring hormones. So when we see a meat product that claims to be "Hormone Free", in reality it should be that those animals that were raised without added hormones. The USDA allows some meat products to be labeled as "Raised without Hormones" meaning that there were no extra hormones given. These animals come from process verified programs that are monitored by USDA so they allow that claim.

Source: meatscience.org