Is grain-free dog food safe?

Grain-free dog food became one of the fastest-growing pet food trends in the 2010s, marketed on the idea that grains are unnatural fillers. The reality is more nuanced — and in 2018, a potential safety concern emerged.

What is grain-free dog food?

Grain-free foods replace grains (rice, barley, oats, wheat, corn) with alternatives like peas, lentils, chickpeas, potatoes, and sweet potatoes. They are not necessarily low-carbohydrate — many have similar carb levels to grain-inclusive foods, just from different sources.

The DCM concern

In 2018, the FDA began investigating a potential link between grain-free diets high in legumes (peas, lentils) and dilated cardiomyopathy (DCM) — a serious heart condition — in breeds not typically predisposed to it (Golden Retrievers, Labrador Retrievers, Miniature Schnauzers).

The leading hypothesis is that high levels of legumes may interfere with taurine absorption or synthesis. Taurine deficiency is a known cause of DCM in cats and in some dog breeds.

As of 2024, the FDA investigation is ongoing. No final causal link has been definitively established, but the signal is strong enough that many cardiologists recommend caution.

What this means in practice

- If your dog is a breed at higher cardiac risk (Golden Retriever, Cocker Spaniel, Doberman), choose a grain-inclusive diet or one that has been long-term tested.
- Grain-free is not harmful for all dogs — many do fine on it.
- The risk appears most associated with foods where peas, lentils, or legumes appear in the first 5 ingredients.
- Grains are not allergens for most dogs — true grain allergies are relatively rare. If you switched to grain-free for allergy reasons, confirm the actual allergen with an elimination diet first.

Flovvi tip

If you have a breed with cardiac risk and feed grain-free, log any symptoms (reduced exercise tolerance, coughing, rapid breathing) in Flovvi and bring the food brand information to your next vet appointment for a cardiac evaluation.