Grain-Free Dog Food: Hype or Healthy? The grain-free pet food market takes in about $2.2 billion in U.S. sales every year. Based on its popularity it seems only reasonable to assume itโs healthy. But is grain-free dog food really a healthier choice? Itโs a question many pet parents are asking in the wake of an FDA investigation into any potential links between canine dilated cardiomyopathy (DCM) and grain-free dog food. While the disease isnโt uncommon in certain breeds, cases have…