The artificial increase in milk production by injecting cows with hormones takes its toll after how many years? 30-40?
It did not matter that they (for your sample of 'they') caused health problems to cows - including mastitis - and it also did not matter that the side-effects of these hormones on human consumption were not fully considered.
One commercial that I clearly remember was by one of those "farmers" saying that if you as a farmer do not inject your cow to increase milk production, you are simply leaving money on the table.
It did not matter that they (for your sample of 'they') caused health problems to cows - including mastitis - and it also did not matter that the side-effects of these hormones on human consumption were not fully considered.
One commercial that I clearly remember was by one of those "farmers" saying that if you as a farmer do not inject your cow to increase milk production, you are simply leaving money on the table.