Breakfast cereal he launched the Cornflakes brand, which overnight captured a national market. Soon there were forty rival manufacturers in the Battle Creek area. His brother William K. Kellogg (1860–1951) worked for him for many years until, in 1906, he broke away, bought the rights to Cornflakes, and set up the Kellogg Toasted Corn Flake Company. William Kellogg discarded the health food concept, opting for heavy advertising and commercial taste appeal. Later, his signature on every package became the company trademark. The second major innovator in the cereal industry was Charles W. Post, a salesman who was admitted to Kellogg's sanitarium as
Laura Cornelius Kellogg were often thought to be very risky what others called "self-serving" Due to this claim, both of the Kelloggs were arrested with the charges of "Pretense of Indian Agents with intent to invest Indian funds". The charges against Laura Cornelius Kellogg and her husband were eventually dropped; however, because of her actions, Kellogg was removed from the Society of American Indians (SAI). Reportedly, Kellogg thought her removal was "an injustice and humiliation". Deeply hurt, Kellogg never forgave the SAI. Kellogg's reputation was not completely ruined. After writing "Our Democracy and the American Indian", Kellogg was once again recognized as a