While federal economists say recovery from the recent recession remains slow, the country’s gross domestic product is expected to grow. However, feed and energy costs for the U.S. dairy industry appear to be headed higher. The expected price for corn, just one example, may reach its highest marketing-year average in history. According to the U.S. Department of Agriculture, those higher input costs likely will raise retail prices for all food products, but consumers buying dairy products may notice the biggest price hikes. …