Raw Egg Whites (Avidin) Poisoning

Why Are Raw Egg Whites Toxic?

Raw egg whites contain a protein called avidin.

Avidin binds to biotin (a B vitamin) in the gut, preventing its absorption.

Chronic consumption can lead to a biotin deficiency, which is essential for skin, coat, and metabolic health.

Cooking the egg denatures avidin, eliminating this risk.

Why speed matters

Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.

Symptoms of raw-egg-whites poisoning

• Skin inflammation and rash (dermatitis).
• Brittle, dry coat or hair loss.
• Lethargy and weakness.
• Muscle pain or stiffness.
• In severe cases, neurological symptoms.

What to do right now

1. Call your veterinarian or a pet poison helpline immediately for advice.
2. Do NOT induce vomiting unless specifically instructed by a professional.
3. Bring your pet to the vet for examination if symptoms are present.
4. Your vet may recommend a biotin supplement if a deficiency is suspected.
5. Prevent future exposure by feeding only cooked eggs.

Sources & further reading

• ASPCA Animal Poison Control — pet poison database & dosage references
• Pet Poison Helpline — toxicology triage guidelines
• Merck Veterinary Manual — toxicology monographs
• Vets Now (UK) — emergency toxicosis guidance

Other poisonings with overlapping signs

• Melatonin Supplement Overdose in Dogs and Cats — shares signs: in severe cases
• Raw Dog Food Poisoning in Dogs and Cats — another common emergency
• Mushroom Poisoning in Dogs — another common emergency

Owners also ask

• My 4 kg cat became wobbly 45 minutes after someone gave her a melatonin supplement — is this normal?
• Is commercial raw dog food packets safe for my indoor cat who snuck onto the counter?

Frequently asked questions

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