Got milk? You probably donât. Or you do, and itâs just a splash in your coffee. Or you do, but itâs 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 companyâs brands include DairyPure, TruMoo, Land O'Lakes, Country Fresh, Deanâs, Garelick Farms, and Friendlyâs.