I sort of hit on this in my journal the other day. Give cows bgh so you can get more milk/meat out of them. Then because it makes them sick on a regular basis, give them antibiotics daily. Run ad campaigns like, "Milk, it does a body good," and "Beef - it's what's for dinner." It's a twofer - not only are girls menstruating earlier, but we're creating superbugs that current antibiotics can't handle.
And there are moobs.
"Right is right, even if no one is doing it; wrong is wrong, even if everyone is doing it." - St. Augustine