[aruanan]

Not too many people pump their chickens full of hormone laced feed to maximize growth: It’s a chicken. Where that becomes profitable is in a large operation where they are selling them by the boatload, where a few extra ounces per unit pays off.

And, at any rate, non-primate growth hormones can't dock with primate growth hormone receptors and, therefore, can exert no hormonal effect on primates. Primate growth hormones, though, are able to dock with the growth hormone receptors of quadrupeds like cows. So, conceivably, a calf could get a growth boost if it drank enough human milk.

[Smokin' Joe]

I’m not so concerned about the growth hormones: the Obama diet schoolkids are being put on will keep their growth in check. It is the estrogens (excreted, recycled in water supplies) and pseudoestrogens (soy) which seem more likely to cause problems.