The article I was talking about was actually presented at Princeton recently accompanied by an article by Peter Singer called "Can Eating Animals Be Justified?" Singer basically presented the argument that you just did, Hip Priest.
Look at Wednesday, November 9th, 4:30 PM:
http://www.princeton.edu/pr/pwb/05/1107/calendar.shtml
I'd like to read his article, I'll see if I can find it online.
http://www.dailyprincetonian.com/arc...ws/13730.shtml