part of the rationale behind me being vagie (and i'm not pagan, so it's not entirely relevent, but still) is that unnaturaleness and huge environmental impact of farming. i think if i were going to eat meat, i'd be eating kangaroo steaks.
that said, i love my dairy, so i know that puts me in the 'hypocrist r us' basket.
i also just can't bring myself to be ok with slaughtering animals. to me, i feel more and more upset about slaughtering an animal based on its intelligence, ability to understand what's going on, feel fear, feel pain, etc. i use humane mousetraps and take my spiders outdoors rather than kill them, but if i flea bomb a place or something, i figure that (as far as i can tell) them fleas die and die reasonably quickly. they don't fret for their herd, or consciously become afraid.
for that sort of reason, i'm especially not ok with eating pigs, who seem really alarmingly intelligent.

still, that's just my framework i work from. but i realise death is a normal part of life. i guess i just feel farming isn't.