Got milk? You probably don’t. Or you do, and it’s just a splash in your coffee. Or you do, but it’s not from a cow. And so Dean Foods, the largest U.S. milk producer, announced this morning that it has filed for Chapter 11 bankruptcy protection. The Dallas-based company’s brands include DairyPure, TruMoo, Land O'Lakes, Country Fresh, Dean’s, Garelick Farms, and Friendly’s.