Despite criticism that smacks of mockery, a San Francisco Bay-area dairy is now selling milk labeled “non-GMO,” claiming that cows producing it had never eaten grains containing genetically modified organisms. Clover Sonoma dairy has been in the vanguard of the movement to purify dairy products by removing or keeping out troubling additives like growth hormones. Its cattle feed has been organic for two decades. But organic milk is expensive. So it devised a cheaper way to ease consumer concerns by adopting the non-GMO labeling. Industry experts, however, say it’s a non-issue. "It's really trying to market a distinction without a difference," said the president of the National Milk Producers Federation, whose "peel back the label" campaign is trying to shed some light on the topic. A UC-Davis animal genomics scientist said, “It's like unicorn-free milk. There aren't any GMOs in milk anyway."