The dairy producer WhiteWave Food has agreed to purchase Wallaby, a manufacturer of organic dairy yoghurt , for approximately $125 million. The deal, subject to regulatory approval, is expected to be completed in the third quarter of the year. The acquisition of the California-based Wallaby will provide WhiteWave with a larger portfolio of yoghurt and kefir beverages as well as a West-Coast based facilities and growth opportunities, according to a …