There are now twelve peer-reviewed studies conclusively linking non-traditional diets to fatal heart condition DCM in dogs.

As of December 8, 2022, twelve peer-reviewed studies implicating non-traditional diets in dogs have been published.

The latest study: “Comparison of echocardiographic measurements and cardiac biomarkers in healthy dogs eating nontraditional or traditional diets”  (8  December 2022)

This veterinary blog has summarized the study:

https://www.alltradesdvm.com/topics/diet-associated-dcm/dcm-articles/dec-2022-healthy-dog-measurements