NEW YORK — Kellogg Co. is a company in transition. After years of removing costs to improve profits through efforts like Project K and the adoption of zero-based budgeting, management is shifting its focus to growing the top line. The initiative is significant and has many moving parts, most notably plans to divest the company's cookies, fruit-flavored snacks, pie crusts and ice cream cones business and the reorganization of its North American sales and supply chain structures.