Since CAFO is a USDA term, I assume your comment (or the source of it) relates to the USA.
https://www.beefcentral.com/top-25-lotfeeders-list/
I believe it is true that cattle get more nutrition from grass in AU than US but I haven't seen numbers that break it down.
https://www.beefcentral.com/top-25-lotfeeders-list/
I believe it is true that cattle get more nutrition from grass in AU than US but I haven't seen numbers that break it down.