Wal-Mart's healthy-eating drive grabbed the headlines this week and prompted speculation about what impact its plans could have on rival retailers and suppliers. M&A speculation swirled around Cargill and Tate & Lyle, as well as Green & Black's, the organic chocolate business once owned by Cadbury but now owned by Kraft Foods. Elsewhere, Glanbia did seal one deal, buying US sports-nutrition business BSN.