The DCM study/paper was quietly “semi” retracted about a year and a half ago. Firstly always look to see who funded the research- in this case it was funded by companies that were being hurt by the grain free lines that were doing well.
The research was a case that was supposed to “prove” that grain, especially corn, was good and a necessary ingredient for dogs because of the amino acid Taurine which helps prevent DCM. But most of the grain free diets added Taurine in the ingredients therefore negating that argument.
Secondly, some of the dogs used in the study were breeds that were predisposed genetically to DCM…Oops… big mistake there. .
While I do agree the use of legumes does raise the protein percentages which I personally don’t like but I do want in my dog’s diet a higher protein/fat to carbohydrate ratio because, as I am sure that you would agree, that carbs are just empty calories. The number 1 issue in most dogs health issues is obesity.