Which dog breeds are most at risk of DCM?

Dilated cardiomyopathy has been recognised as a largely inherited disease in certain breeds for decades, well before grain-free food was on any shelf. Dobermanns are the classic example, along with Great Danes, Boxers, Irish Wolfhounds, Newfoundlands and Cocker Spaniels. Large and giant breeds are over-represented generally.

Golden Retrievers are worth mentioning separately. They appeared more often in the FDA's diet-associated reports than their numbers would suggest, and there's reasonable evidence that some Goldens are less efficient at making their own taurine, which may be part of the picture.

If you've got one of these breeds, the useful response isn't switching food out of nervousness. It's regular vet checks, and knowing what early signs look like: tiring more easily on walks, coughing, breathing faster than usual while resting or asleep, a swollen belly, or fainting. Any of those means a vet appointment, not a wait-and-see.

Some vets will suggest screening for at-risk breeds, which can pick things up before symptoms show. Ask yours what's sensible for your dog's breed and age. Whatever's in the bowl, an early diagnosis does far more for a dog with a heart condition than any ingredient decision will.