Has anyone read Peter Singer on the subject of raising animals for food? Can't remember where I read it, perhaps NYer. His pov was useful to me, basically for wise raising, my words. We have a company up here called Humboldt Beef, which is, to me, wisely run. And Humboldt County dairy farms are nearly all free of the use of this and that. (And one fellow in, I think, west Marin county generates electricity from poop.)
Here's the link. The links in the thread explain all this better than I.
A2k topic - Cows ok!
Niman Ranch beef, which is pretty popular in at least California and probably somewhat further east, also avoids antibios, at least to some extent. I haven't looked them up lately, so I can't promise. In any case, Humboldt Beef Company and other companies like them make sense to me.