I've spoken with plenty of animal-eaters in my time, and one of their favourite reasons (excuses?) for doing so seems to be that we are simply superior to the animals we eat. We are the dominant species on the planet, and so it is our right to eat whatever inferior animals are under our dominion.
So what if a highly advanced, super-intelligent alien species arrives, subjugates us, and becomes the dominant species on the planet? Presumably meat-eaters should have no problems with their systematically breeding, caging, slaughtering and eating us - it would be their right as our superiors.
Any thoughts?