Interesting blog. In one article [1] she makes a point of only injecting 2-5% of...

Interesting blog. In one article [1] she makes a point of only injecting 2-5% of her animals with antibiotics. In a second article [2], she talks about feeding ionophores and how they are not classified by the FDA as antibiotics. Of course they are antibiotics, they just aren't used as human drugs.

[1] http://feedyardfoodie.wordpress.com/category/antibiotics-hor...

[2] http://feedyardfoodie.wordpress.com/2011/12/13/the-misunders...

Edit: Here's an article discussing the enormous use of tetracycline in agriculture:

http://www.livablefutureblog.com/2010/12/new-fda-numbers-rev...

So the agricultural use of human useful antibiotics is at a similar or higher level than the use of ionophore feed additives.