And even among ruminating mammals, there's no such thing as veganism. Cows grazing free in the open fields as nature intended will still gladly chomp down on any mice, worms, or other small animals unfortunate enough to get caught up in their mouthfuls of grass.

And even among ruminating mammals, there's no such thing as a veganism. Cows grazing free in the open fields as nature intended will still gladly chomp down on any mice, worms, or other small animals unfortunate enough to get caught up in their mouthfuls of grass.