That's the eternal question isn't it: Where's the line?
In this case I think the question is something like "is it cruel to eat an animal?"
I'm not a spiritual person, but I like what the general consensus of the tribes around the Great Lakes (and elsewhere) saw of it: we're very much part of the [natural] world, not above or outside of it in any way. And I don't see that as a bad thing. Now, talking scale of consumption and all that is another matter that I didn't gather was at the core of this discussion—at least that is the way I've been framing my comments.
But now I'm getting a bit worried I'm taking this too far off track of the actual linked content and discussion so I think I'll have to leave it at that—but I'm happy to continue to discuss if you wanted to—just fire me an email.