CINCINNATI - Macy's Inc. fired the person in charge of in-store growth initiatives last week, prompting one retail expert to predict "hundreds" more store closures could be in the company's future. "We're in the second inning," said Howard Davidowitz, a New York-based retail consultant. "The fastest growing area of their business is online. What do you do with all these stores?" Macy's did not respond to questions raised by Davidowitz, a former Ernst & Young principal whose firm advises retailers on real estate and growth strategies. Macy's Chief Financial Officer Karen Hoguet wouldn't rule out additional store closures in a November conference call with analysts. "We think closing 100 stores roughly will get us to the optimal fleet size," she said. "Things happen all the time in terms of real estate, malls and locations that I can't predict. So, are we 100 percent sure that it's just 100 stores? No, of course not."