Alerts from the FDA identify an associated risk for some grain-free diets containing certain ingredients (legumes like peas, pea components, and lentils;) with the diagnosis of dilated cardiomyopathy (DCM), a heart muscle disorder that results in a weak pump function and heart chamber enlargement.
The key thing is to avoid any grain free foods with legumes, such as peas, chickpeas, lentils and so on. Here are the links we recommend.