Nutrition in the cat with acute kidney injury that won't eat
7-year-old cat with slowly recovering acute kidney injury (creatinine 5.8 mg/dL and falling). It has not eaten for 4 days despite nausea being controlled with maropitant.
What is the most appropriate approach to its nutrition?
chevron_right Show answer and explanation
A. Wait until it eats on its own once azotaemia falls, because fasting reduces urea production
Fasting increases muscle catabolism, which also generates urea, and malnutrition impairs immunity, healing and survival.
B. Force-feed it by syringe with a renal diet
It is stressful, rarely meets requirements, promotes food aversion and carries a risk of aspiration.
C. Place a feeding tube (nasoesophageal short term, or oesophagostomy if prolonged) and increase intake over 2–3 days
Correct. More than 3 days of anorexia justifies enteral support. Start with a fraction of resting energy requirements and monitor phosphorus, potassium and glucose, because of the risk of refeeding syndrome.
D. Total parenteral nutrition from the start, because the uraemic gut does not tolerate food
If the gut works, the enteral route is preferable: it is more physiological, maintains the intestinal mucosa and has fewer complications than parenteral nutrition.
lightbulb Key takeaway
A nasoesophageal tube needs no anaesthesia and is useful in unstable patients; an oesophagostomy tube allows feeding and medicating at home for weeks. Choose a suitable recovery or liquid diet and keep the renal diet for the chronic phase if azotaemia persists.
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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.