The US Food and Drug Administration is investigating the link between certain pet foods, many labeled as "grain-free," and canine dilated cardiomyopathy (DCM). Golden Retrievers and Labrador Retrievers, breeds not disposed to DCM, began being reported with DCM. All reported cases had consistently eaten grain alternatives in their diets The AKC article is at https://tinyurl.com/yy764myg. The AKC article lists the dog foods with reported DCM cases and the number of reported cases. The article has links to FDA studies.
Dr. Josh Stern at UC Davis is conducting a study on DCM in Golden Retrievers. His work is described at https://tinyurl.com/y8955nl4. Golden retrievers can participate in the study if they have been fed Royal Canin, Purina or Hill's Science Diet for a period of at least 3 months, have not been previously diagnosed with DCM and are not being fed taurine supplements. Participants receive an echocardiogram and a taurine level test. If you are feeding other brands, you still might be able to participate, but may need to pay for the taurine testing. You can contact firstname.lastname@example.org for more information.