They have no consciousness therefore. Therefore what? Therefore we are free to use them for our own ends? Therefore we are free to kill them? Why? What is so special about the form of consciousness we recognize that makes killing a bearer of it a crime while killing an animal goes unpunished?...all this discussion of consciousness and whether animals have it is just a smokescreen. At bottom we protect our own kind. Thumbs up to human babies, thumbs down to veal calves.