"According to the Organic Consumers Association, half of Horizon's "organic" milk today comes from what can only be considered "factory" dairy feedlots -- and much of Aurora's organic milk does as well. Rather than buy organic calves that have been raised from birth on organic farms, these companies seemed to have discovered it's cheaper to buy conventional calves that have been raised on conventional farms, install them in factory feedlots, then milk them and call it organic."
Read an interview with Ronnie Cummins, National Director of the Organic Consumers Association. I recommend reading this article since it is a real eyeopener.