Granola bars, oatmeal, eggs, and Greek yogurt. Blame them for the decline in cereal consumption that is hurting the company that makes Frosted Flakes, Rice Krispies, Corn Flakes, Froot Loops, and Apple Jacks. Kellogg, the world's largest cereal maker, is hurting. The company’s U.S. morning-foods net sales fell 8% in the fourth quarter of 2014. It was the division’s seventh quarterly decline in a row. Despite $1 billion a year on advertising, sales of 19 of Kellogg’s top 25 cereals fell last year.