Tony the Tiger is not doing so grrrrreat... Kellogg Co, the world's largest maker of breakfast cereals, says it will cut about 7 percent of its workforce and slash capacity by 2017, after reporting another quarterly decline in sales in its cereals business. The company's cereals business has been battling stiff competition from General Mills and private-label cereal brands. Increasing popularity of yoghurt, frozen egg sandwiches and other breakfast items has also hit the business. Sales at Kellogg's U.S. morning foods business, which includes cereals such as All-Bran, Coco Pops and Froot Loops, fell 2.2 percent in the third quarter....