You make some good points, and it's probably around the late 1800s that the move to corn grain became more common. I should note also that studies clearly show health benefits of "grass"-fed corn (higher Omega 3s for example).<p>It's true corn is a grass. Actually, all true grains are grasses, I believe, and farmers are allowed to feed a percentage of grain crops and still call their animals "grass fed" <i>if</i> they feed the young sprouts (pre-seed), but the FDA (or USDA?) doesn't allow them to call it grass-fed otherwise.<p>I wonder what term could be used to replace "grass-fed" that would more specifically define what is meant.