Updated September 25, 2026. Fact-checked against veterinary sources; review by a licensed veterinarian is in progress. See our editorial policy.
Quick answer: For dogs with heart disease, the most important dietary goals are maintaining a healthy weight and muscle mass, avoiding high-sodium foods and treats, and making sure your dog keeps eating, especially once heart failure develops. Severe salt restriction is usually only needed in advanced stages. Omega-3 fatty acids may help appetite and muscle. The FDA has investigated a possible link between some diets and dilated cardiomyopathy, so ask your vet about your dog’s food.
Key goals
- Keep weight and muscle: muscle loss (cardiac cachexia) is linked to worse outcomes
- Moderate sodium: avoid salty treats, deli meats, cheese, and table scraps. Your vet may recommend more restriction in later stages
- Appetite: keep food appealing, and tell your vet if your dog eats less
- Omega-3 fatty acids: may reduce muscle loss and help appetite
Diet-associated DCM
Since 2018, the FDA and veterinary cardiologists have investigated cases of DCM in dogs eating certain diets, many labeled grain-free and high in peas, lentils, or potatoes. A cause hasn’t been confirmed, but some affected dogs improved after a diet change. Discuss your dog’s diet with your vet.
Supplements
- Taurine or carnitine only if your vet recommends them, for example in some breeds or diet-associated cases
- Check that pill pockets and treats used for medication aren’t too salty
Practical tips
- Low-sodium treats like fresh vegetables or apple slices
- Weigh regularly
- Count treats used for giving pills
Sources
- Keene BW, et al. ACVIM consensus guidelines for the diagnosis and treatment of myxomatous mitral valve disease in dogs. J Vet Intern Med. 2019
- US FDA: Investigation into potential link between certain diets and canine dilated cardiomyopathy
- Freeman LM, et al. Diet-associated dilated cardiomyopathy in dogs: what do we know? JAVMA. 2018
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.