DCM (dilated cardiomyopathy) and the grain-free debate

Dilated cardiomyopathy, or DCM, is a disease of the heart muscle that causes the heart to enlarge and weaken, reducing its ability to pump blood. Since 2018 the FDA has investigated reports linking some cases to certain diets, often [grain-free](/glossary/grain-free) and high in legumes such as [peas](/glossary/peas) and [lentils](/glossary/lentils), but a causal link has not been established and the investigation remains open and non-causal as of the FDA's December 2022 update (FDA CVM, Dec 2022). The editorial stance here is firmly evidence over alarm. DCM has well-recognised genetic causes in certain breeds, such as Dobermanns and Great Danes, and a separate, established association exists with [taurine](/glossary/heart) deficiency in some cases, which complicates any simple diet-blame narrative. The reported cases include dogs on grain-free, legume-rich foods, but the mechanism, if any, is unknown, and many dogs eat such diets without harm. The practical advice is to consult a veterinarian before changing diet rather than reacting to headlines, since switching foods abruptly carries its own risks. The marker: the grain-free and DCM question is genuinely unresolved, so it should be presented as an open, monitored investigation, not a proven danger, a stance maintained throughout the [Petipedia glossary](/glossary). See [grain-free](/glossary/grain-free) for the wider context.

Petipedia · Editorial team

General documentary information. For an individual animal, a veterinarian's advice takes precedence over any online content.