Walmart Inc. (NYSE:WMT) saw its stock ease slightly on Tuesday as the retailer marked a major expansion of its dairy operations with a new milk processing facility in Georgia.The move deepens Walmart's effort to control more of its grocery supply chain and offer shoppers dependable pricing.The company opened its second self-operated dairy plant in Valdosta, where the facility will support more than 400 jobs and strengthen regional access to lower-cost milk.Also Read: The Costco Effect Highlights How New Cos ...