FDA Says Dog Heart Disease Is Potentially Linked to Certain Foods The agency has made a loose connection between “grain-free” dog food brands and the development of canine dilated cardiomyopathy (DCM). The FDA did not name specific brands but said food that is based on peas, lentils or potatoes were found to contribute to an enlarged heart in dogs. Some breeds are genetically predisposed to the condition and include St. Bernards, Newfoundlands, Doberman pinschers and boxers. FDA, via NBC News FDA, via NBC News The FDA also noted taurine deficiency can lead to DCM, but there are heart drugs available.