Well.... depends on what you mean by "eat". On some upper dimension the goddesses are certainly consuming something in order to maintain thier 3 dimensional form. When they're cut off from that supply(heaven) in the manga, K1 has to construct another source of energy... apparently sake, ice cream, and tea just aren't quite enough. Maybe it's not what we'd call food, but in reality all matter seems to be little more than energy, so what if we process the energy a little less well.
As far as killing living things, Belldandy sees almost everything as being alive.... animals, trees, motorcycles, stones, the wind itself even....apparently just about everything has some form of spirit. When a puppy enters thier lives and reminds keichii of a puppy he lost as a child, she eventualy gets K1 to realize that's not the end that's important, it's how much you cherish the time you have. She knows everything has it's time, it's purpose, and it's end, and while she dosen't go out of her way to harm things, she's not likely to be opposed to or upset by the necessary actions of the farmers and fishers of the world.
19-Jul-2006