Cardiac cachexia and diet in heart failure
11-year-old Cavalier King Charles in stage C, stable on medication. Over the past year it has lost weight and its spine and temporal muscles are prominent. Its appetite is poorer and the owner gives it cured meats to get it to take its tablets.
Which nutritional recommendation is most appropriate?
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A. Restrict protein to reduce the renal load from diuretics
Cardiac cachexia is loss of lean mass: restricting protein accelerates it. Protein is only limited when advanced kidney disease justifies it.
B. Sodium restriction as severe as possible, even if the dog eats less
A very low-sodium diet is often unpalatable and worsens intake. The recommendation is moderate restriction, prioritising adequate food intake.
C. A palatable diet with adequate calories and protein, moderate sodium, an omega-3 supplement (EPA and DHA) and avoiding salty treats
Correct. The 2019 ACVIM consensus recommends maintaining caloric and protein intake in stage C, moderate sodium restriction and considering EPA and DHA, which may reduce the inflammatory cytokines of cachexia and improve appetite. Cured meats are very salty: find alternatives for giving tablets.
D. A weight-loss diet, because obesity worsens heart failure
This dog is already losing weight and muscle. In heart failure weight loss is associated with poorer survival; the goal is to maintain or regain muscle condition.
lightbulb Key takeaway
Assess muscle condition, not just weight, at every visit, as diuretics and ascites can mask lean mass loss. Check the sodium content of treats and of foods used to give tablets. In cats, make sure the diet provides adequate taurine.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.