One problem with this argument is that to eat chicken or pork, you have to be okay not only with killing animals, but with torturing them as well - there's no better word for the conditions in which chickens and pigs are typically kept.
This is perfectly well true, but I'm not interested in addressing this because I have never known this to be anyone's sufficient objection to eating meat.
Would you eat a well-treated chicken? How about a deer instantly killed by a Predator drone equipped to vaporize its brain faster than neurons react?
http://www.smbc-comics.com/index.php?db=comics&id=2393#comic