Meat eating ethical?

[Tea Earl Grey Hot]

So, if a superior alien race came to earth, would it be ethical for them to eat us?

You seem to imagine ethics is some sort of objective thing whose form and existence is a material objective fact that would be perceptible independent of whether it is you, or an alien race, that is examining it.

No, I do not believe in objective morality. I'm merely pointing out inconsistencies in the way ethical assumptions are applied. Most us here for instance assume the golden rule or something like it: do unto others as you would have them do to you. Meat eaters apply this only to humans which I think is an arbitrary limit. Again, what's the difference between humans and animals? Are they not "others"? If it's just intelligence that's the determining factor, then can we fry people with downs syndrome?

Another question...which is more immoral: to kill a human or to kill a chicken? Why?

In fact it is by fundamental nature an artifical mental construct for the convenience for its creator.

You seem to assume that an ethical system only applies to the species who created it which is just again another instance of assuming that species matters at all in ethics.