Comment by jmole

I think if you watch video of a massive meatpacking plant, you'll pretty quickly realize how hard it would be to track. At the commodity scale, basically no one in the supply chain other than the rancher seems to care where the meat comes from. And the brands (Tyson, Smithfield, etc.) only want consumers to care about the logo on the box.

Literally the canonical example of capitalism-as-meat-grinder.