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My dog has heart failure. Is a low sodium diet necessary? Symptoms?

Updated On September 23rd, 2025

Pet's info: Dog | Cavalier King Charles Spaniel | Female | spayed | 4 years and 11 months old | 17 lbs

How common is a very low sodium diet such as heart care by Hills absolutely needed once a dog is in advanced heart failure? What would be the symptoms of them needing a prescription diet vs. just feeding them their regular diet? can you please explain. I'm not a fan of hills products. My dog is currently healthy but she is prone to heart conditions because she is a Cavalier King Charles Spaniel.

2 Answers

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on June 16th, 2017

Of course it is more ideal to be on a prescription heart disease due to the low sodium content but I have found not a lot of dogs are willing to eat it. I would prefer a dog to eat their regular well balance food than not eat at all and honestly, I do not find a huge difference in success in treatment when comparing the dogs that eat the special diet vs those that won't. I would make sure if she does develop heart disease that she is properly worked up (chest X-rays, blood pressure, ECG, and echo) then put on the appropriate medications to treat her heart disease.

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    Answered By Lindsey Edwards MVB, BSc, IVCA

    Veterinarian

    Published on

    A low sodium diet such as hills or royal canin cardiac prescription diet is generally only recommended if heart failure, fluid retention and blood pressure issues arise and are not likely to prevent such development. A high omega fatty acid supplement has shown some promise in delaying onset of symptoms and these diets often combine these benefits also for early use

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