Maybe. Maybe not: https://news.ycombinator.com/item?id=28622417

> I always like to point out that before the Europeans decimated the American bison, there were more head of bison roaming the west than there are head of cattle today. Just turning our monocrop soy and corn farms in the midwest back to prairie (by actually doing nothing to the land - just leave it alone), we could have regenerative ranching and cows and more food for less energy input than we do today.

I don’t know for sure if that’s true, but it sure as hell wouldn’t surprise me.