Kellogg Co  reported a surprise increase in sales after  quarterly declines, getting a boost from higher demand for its frozen foods and Kashi snacks.

  Sales in the unit housing frozen foods, Kashi and Kellogg’s Canadian business rose 4.5 percent to $420 million in the third quarter but cereals and snacks in the U.S. faltered again.

  Kellogg’s net income rose to $297 million, , in the third quarter ended Sept. 30, from $292 million.

  Kellogg bought Kashi, which makes whole grain cereals and other plant-based foods, in 2000 to cash in on the fast-growing natural and organic foods market.