Quick Answer
A five-year veterinary study links boutique grain-free dog diets to non-hereditary Dilated Cardiomyopathy (DCM).
What the study measured
Echocardiographic changes were tracked across breeds with no hereditary DCM predisposition.
The taurine question
Legume-heavy formulations appear to interfere with taurine availability, though the mechanism is not fully settled.
What to do now
Do not switch diets reactively. Discuss any grain-free formulation with your vet, particularly for large breeds.
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