Most high protein diets are high in fat. High fat diets are not well tolerated by many dogs and can lead to overweight dogs. High protein/high fat no grain diets, IMO, are appropriate for high activity dogs (ie border collies, hunting dogs).
On another note, I know Quincy had fat deposits in his eyes after being on Evo. I have heard a few other veterinarians reporting the same findings.
Dogs are omnivores...and most of our house pets are not nearly as active as their wild ancestors AND they have not eaten the same diet as their wild ancestors so do not have identical digestive systems. They're not wolves.
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