Suiza Foods Corporation (NYSE: SZA) and Dean Foods Company (NYSE: DF) announced today that they have filed a preliminary joint proxy statement/prospectus with the Securities and Exchange Commission in connection with their planned merger. Completion of the merger requires the approval of the shareholders of both companies. Once finalized, the joint proxy statement/prospectus will be mailed to all shareholders of Suiza and Dean in connection with the solicitation of votes. The document must undergo routine SEC review and comment before it can be finalized.