The whole book is informative and very depressing at the same time. However, I think we need to face reality and stop denying the wrongness of today's meat processing practices (at least those of factory farming).
As Paul McCartney puts it: "If slaughterhouses had glass walls, everyone would be a vegetarian."
Maybe I missed the point, but I thought that McCartney's point had to do with witnessing the distress (and the killing) of the animals, not with the specific practices.
So I thought that if you're willing to kill the animal yourself, then maybe you're able to condone the slaughterhouses even if you see them through a glass wall
(maybe it will diminish your appetite, though :P - I wouldn't want to see it while eating!).