I don’t know. If you look at the biomass of around 100 million bison in the wild (a wild bison is SO much larger than a domesticated, corn-fed steer), as it would stand NATURALLY in the US & Canada, if man was never even here, it would probably be around the same as what we’re breeding and slaughtering in a cycle currently.
I do think that cattle should be grass fed, and not grain fed.
And while I can’t say with 100% certainty, I’ve never read of anything found in cave paintings from the natives, concern about Bison farts.