Well, my point is that I don't think there's much that can't be consumed, aside from the usual taboo items (other people) and things that are just too ugly to eat (other people). The issue is how you raise your food and how you harvest or slaughter it. It should be done respectfully, with the good of the product being the priority. Animal or vegetable, the good of the product contributes to the good of the human.
I have more opinions on animal and vegetable rights--and minerals too--you'll be interested or horrified to know. I'll hold forth on this at greater length in another post.