French dairy giant Danone SA’s pending $10 billion acquisition of Boulder-born organic foods company WhiteWave Foods isn’t sailing through without some opposition.

The Camera reports that the Cornucopia Institute, a watchdog group for the organic industry, on Wednesday asked federal anti-trust regulators to block the deal “because it would concentrate too much control of the U.S. certified organic milk industry in one company’s hands.”

Founded in Boulder, WhiteWave is headquartered in Denver and bases its North American operations in Broomfield. Danone announced its plans to acquire WhiteWave in July.