One crazy thing I recently heard that put this into perspective is that Livestock makes up approximately 60% to 62% of the world's total mammal biomass. Combined with humans (approx. 34%–36%), domesticated livestock means humans and their animals constitute roughly 96% of all mammalian biomass on Earth, leaving wild mammals at only about 4%.

I suppose Frontier living doesn't necessitate hunting, but the amount of readily available meat and animal products would have to drop very low.