This has been frustrating to watch unfold. Of five major brands not implicated -- Purina, Royal Canin, Hill’s Science Diet, Eukanuba, and Iam’s -- we've tried four and they do not agree with my dog. The brands I have found that he thrives on, Fromm and Taste of the Wild, are listed here as possibly being linked to DCM (although he does well on non-grain-free Fromm). It has been a struggle finding an ideal food not linked to DCM but also agreeable to my dog.