Spratt dominated the American market until 1907, when F. H. Bennett, whose own dog biscuits were faring poorly against those of the larger company, had the idea of making them in the shape of a bone. "His 'Maltoid Milk-Bones' were such a success that for the next fifteen years Bennett's Milk-Bone dominated the commercial dog food market in America." In 1931, the National Biscuit Company, now known as Nabisco, bought the company.
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