We're omnivores. It's natural for us to eat both plant and animal. It's what we're supposed to do.
I mean, not everything in this world is flat out right or wrong. It's not "wrong" for a lion to eat antelope and it's not "right" for an antelope to die to be eaten. It's not right that grass should have to die to feed a buffalo any more than it's right or wrong for the buffalo to later die to feed a cougar or wolf, they are things that just "are".