In the situation you describe, some meat eaters might still want to eat sapient livestock because some people consider "natural" behaviors to be moral. But there's no reason to belabor the point--what I was trying to convey above was this: most-moral-minority sometimes oppresses the minority (e.g. the snarf example above) and impedes moral progress. There are certainly cases where it does work, but there are also borderline cases like this one and negative cases like snarf.