Updated October 31, 2026. Fact-checked against veterinary sources; review by a licensed veterinarian is in progress. See our editorial policy.
Food choices can affect how well a dog with heart disease feels, but there isn’t one diet suitable for every diagnosis. A dog with early heart disease may need different feeding advice from a dog with congestive heart failure, poor appetite or muscle loss. Ask your veterinarian or veterinary cardiologist which changes matter for your dog’s current stage.
Be careful with salty extras
Processed meats, bacon, salty cheeses, chips, salty broths and heavily seasoned table scraps can add substantial sodium to a dog’s diet. Dogs with congestive heart failure may need tighter sodium control because excess sodium can contribute to fluid retention. The amount appropriate for your dog depends on the disease and medications; don’t impose an extreme low-sodium diet without advice, especially if it causes your dog to stop eating.
Check treats, pill wraps and supplements as well as the main food. A seemingly tiny daily snack may add up. Your veterinary team can suggest lower-sodium options that fit the rest of the diet. Never feed foods containing xylitol, and keep chocolate, grapes and raisins away from dogs.
What about grain-free foods and dilated cardiomyopathy?
The U.S. FDA has investigated reports of canine dilated cardiomyopathy in dogs eating certain diets, often those with legumes or potatoes high in the ingredient list. The investigation has not established that every grain-free food causes heart disease, or that a single ingredient explains every case. Discuss the full diet history, not just the “grain-free” label, with your veterinarian. Avoid switching to a homemade or specialty diet without a nutrition plan.
What matters besides sodium?
Dogs with cardiac disease still need enough calories and complete nutrition. In some cases, unintended weight loss and loss of muscle can become major problems. Your veterinarian may monitor body condition, muscle condition, kidney function and electrolytes, particularly for dogs taking diuretics or other heart medications. Supplements such as taurine are only appropriate when indicated, not as a universal substitute for cardiac treatment.
See our guide to diets for dogs with heart disease. Bring the exact brand, product and treat labels to your next cardiology appointment.
Veterinary references
- FDA: Investigation of Diets and Canine Dilated Cardiomyopathy
- Merck Veterinary Manual: Cardiovascular Disorders
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.