A customer shops for groceries at a Chicago supermarket. Nam Y. Huh/AP hide caption toggle caption Nam Y. Huh/AP The companies that make our food and home essentials are officially sounding alarms about what lies ahead for the U.S. shopper. "Relative to where we were three months ago, we probably aren't feeling as good about the consumer now," PepsiCo's Chief Financial Officer Jamie Caulfield told investors on a call Thursday. The largest consumer conglomerates are cutting their financial fo...