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Clinical Symptom🐕 Dogs🐈 Catsgastrointestinal

Anorexia (Inappetence)

🗣️ Pronounced:an-oh-REK-see-uh
In One Sentence (Plain English)

The complete lack or loss of appetite and refusal to consume food.

Editorial Status: Verified from peer-reviewed veterinary sources (v1.0)
Updated: 2026-01-15

💬 In Plain English

In veterinary medicine, anorexia means a total refusal to eat (unlike the human psychological eating disorder). If a pet merely eats less than usual, veterinarians call it "hyporexia." Animals stop eating for many reasons: physical pain (like a broken tooth or mouth ulcer), gastrointestinal nausea (pancreatitis, kidney disease, stomach bugs), loss of smell (severe nasal congestion in cats), systemic fever, or emotional stress. In cats, true anorexia is especially dangerous: going without food for even 2 to 3 days forces the body to mobilize fat to the liver, causing life-threatening hepatic lipidosis (fatty liver disease).

🔬 Clinical & Technical Depth

For Vets & Technicians

Formal Clinical Definition

Complete cessation of voluntary food intake. Hyporexia denotes reduced food intake. Dysphagia denotes the desire to eat with physical inability to apprehend, masticate, or swallow.

Why Veterinarians Use It

Veterinarians assess inappetence to prevent catabolic wasting, dehydration, and feline hepatic lipidosis.

Clinical Context Encountered

One of the most frequent clinical presentations triggering laboratory diagnostics and nutritional interventions.

Clinical Reference Guide (Clinical Symptom)

Urgency Level

🚨 Red Flag Warnings (When to Contact an Emergency Vet)
  • •An overweight cat that stops eating for more than 48 hours is at extreme risk of developing Feline Hepatic Lipidosis (fatty liver disease), which is fatal without nutritional intervention.

❓ Questions to Ask Your Veterinarian

Take these actionable questions with you to your next clinic visit or appointment:

  • 1Is my pet truly anorexic (refusing all food) or hyporexic (eating only small portions)?
  • 2Does oral examination show broken teeth, stomatitis, foreign strings under the tongue, or ulcers?
  • 3Would an appetite stimulant like capromorelin (Entyce for dogs) or transdermal mirtazapine (Mirataz for cats) be helpful?
  • 4If my cat has not eaten for 48 hours, is assisted enteral feeding (feeding tube) necessary?

Academic & Clinical References