Our milk cartons all say the milk comes from cows not treated with rBST and I had no idea why they thought it important not to use it. RBST is an artificial growth hormone and I figured it was just one more thing people concerned with their health try to avoid. I've heard drinking milk from those cows might make kids reach puberty earlier.
Now I know using the growth hormone is cruel to cows. It doesn't just make them grow or reach maturity faster, it makes them produce so much milk their udders become huge enough to drag on the ground when the cow walks. If you've ever nursed a baby you can imagine how painful that must be.
Using RBST actually tortures cows so their owners can sell more milk and make more money. I'm glad the milk we buy isn't from cows treated so cruelly and from now on I'll never buy another brand without making sure it isn't either.