I'm a vegetarian, however I completely believe in killing and eating animals, it's the natural order of things, it's been happening since life was just single cell organisms. The reason I'm a vegetarian is that I hate how animals are being kept in farms. Pigs can barely turn around in their cages, chicken live with perpetually broken legs, etc. The killing techniques are quite humane, however their lives aren't.
"They'll never know any better!" you might say, but Plato's cave isn't a great place to live, even for the cave dwellers...