A cow grazing a pasture is not killing the mice in that pasture. Its true that winter fodder (hay) requires cutting the field (three times over the summer). But that isn&#x27;t the same as plowing, planting, cultivating and for some crops, digging to harvest. So grass-fed beef is absolutely several orders of magnitude less devastating to animal life. One cow is killed to feed several people. Instead of millions of rodents killed to provide potatoes.