Kellogg, the 117-year-old brand that started as a breakfast cereal company and has since expanded to be one of the largest food companies in the world, has seen declining cereal sales. The one-time category leader is now facing such setbacks as countless lawsuits over its nutritional value amid a more health-conscious consumer base. In response, the company announced plans last June to split into three separate companies. The question is though: Will that be enough to rebound its cereal segment?