It’s important to remember that organic is not the same as grassfed. Natural food stores often sell organic beef and dairy products that are hormone- and antibiotic- free. These products come from animals who were fed organically grown grain, but who typically still spent most of their lives (or in the case of dairy cows perhaps their whole lives) in feedlots. The sad reality is that almost all the organic beef and organic dairy products sold in the U.S. today comes from feedlots.

Just as organic does not mean grass-fed, grass-fed does not mean organic. Pastured animals sometimes graze on land that has been treated with synthetic fertilizers and even doused with herbicides. Unless the meat label specifically says it is both grassfed and organic, it isn’t.

http://foodrevolution.org/blog/the-truth-about-grassfed-beef/