Yep, the question still remains as to whether there's a true causal link or not.
But, I'm not taking that chance given that Seren is a giant breed with a genetic heritage that means she has a predisposition toward DCM.
Note this in the article:
"In the Dec. 1 version of the Journal of the American Veterinary Medical Association, Lisa M. Freeman, DVM, Ph.D., DACVN, provided an update to the research on DCM and emphasized the issue is not just grain-free diets. She calls the suspected diets “BEG” diets (boutique companies, exotic ingredients, or grain-free diets). Freeman emphasizes that although there appears to be an association between DCM and BEG diets, the relationship has not yet been proven, and other factors may be equally or more important."
So, it may not be just a grain-free diet (which was implicated in connection with the canine's body to process taurine, IIRC). It may be a combination of a lot of things. Or just one thing.
To be honest, thinking about this makes me somewhat frantic. That's just the way I am.