Ah, see, you're an ethical vegan then? That's part of why we differ, because I find the ethical argument, by far, the least convincing of any. Tell a tiger how it's unethical to kill and eat an antelope. We're animals too after all. No one is ever going to make me feel bad about killing animals, and it's the same for many, many other people. Nothing wrong with being relatively clean and humane while doing it, but I have no problem eating Bessie the Cow no matter how beautiful her dark brown eyes are.
On another note, I haven't had a chance to read this book, but it pertains to this thread: