Beaver's anal gland doesn't bother me. I'm guessing that's not in there, since it's supposed to appeal to vegans and vegetarians.

The overprocessing is a point versus environmental impact. But for us all to be eating as much meat as we want to, grass feeding becomes a bit of a bottleneck. And anything you can say about raising plants to feed humans you can say about raising those plants to feed animals humans eat--more so, because you lose a lot of protein and calories in the process.