Is grain-free dog food bad for dogs?

There's no evidence that grain-free is universally harmful, but the FDA's ongoing investigation has found an association between diets high in legumes (peas, lentils) and dilated cardiomyopathy in dogs, particularly when these ingredients appear as primary components. Veterinary nutrition organizations advise caution and suggest discussing grain-free diets with your vet, especially for breeds predisposed to heart disease.

Do dogs actually need grains in their diet?

No -- grains are not biologically required for dogs, but they're also not harmful for most dogs. Dogs digest starch efficiently, and grains in a well-formulated diet provide digestible energy alongside other nutrients. The absence of grains is not a health problem, but neither is their presence in a quality, complete-and-balanced food.

What is DCM and how does grain-free food relate to it?

Dilated cardiomyopathy (DCM) is a heart muscle disease where the heart becomes enlarged and pumps less effectively. Some breeds are genetically predisposed to it. Since 2018, the FDA has been investigating reports of DCM in breeds not typically associated with it, with a notable proportion of affected dogs eating grain-free, legume-heavy diets. A definitive causal link has not been established, but the investigation is ongoing.

My dog seems to do better on grain-free food. Should I switch back?

If your dog is doing well clinically and the diet is meeting their nutritional needs, there's no urgent reason to switch immediately -- but discussing it at your next vet visit is a reasonable step. The vet can assess whether cardiac monitoring makes sense for your dog's breed and history, and help evaluate the overall quality of the diet.

What should I look for in a high-quality commercial dog food?

WSAVA guidelines suggest looking for manufacturers who have a full-time veterinary nutritionist on staff, conduct feeding trials using AAFCO protocols, publish nutritional research, and have robust quality control processes. These factors are more meaningful predictors of diet quality than whether the food is grain-free or grain-containing.

Grain-Free Dog Food Explained | PetCalculator

Grain-free diets have become popular, but the FDA has been investigating a potential link between certain grain-free foods and heart disease in dogs. Here's a balanced look at what's known.