Quantity
A single raw egg is unlikely to cause biotin deficiency but does carry bacterial risk. Regular raw egg feeding (several times a week over weeks) is where biotin deficiency develops. Any raw egg exposure carries the salmonella risk regardless of frequency.
Notes
The raw feeding community sometimes promotes raw eggs for cats. While the bacterial risk is real, it's the chronic avidin exposure that veterinary nutritionists worry about most. Cooking the egg solves both problems completely — scrambled or hard-boiled eggs (no butter, oil, or seasoning) are a safe, protein-rich treat for cats. The yolk alone is less risky than the whole raw egg because avidin is concentrated in the white.
Negative Signs
* Vomiting and diarrhea (from bacterial infection)
* Fever and lethargy
* Loss of appetite
* Dull, thinning coat over time (biotin deficiency)
* Skin lesions and dermatitis
* Weight loss with chronic raw egg feeding
FAQ
Q: I feed my cat a raw diet that includes raw eggs. Is that safe?
A: The biotin-blocking avidin in raw egg whites is a legitimate concern with repeated feeding. Many raw diet advocates suggest feeding yolks only or supplementing with biotin. However, the safest approach is to simply cook the eggs — it eliminates both the avidin problem and the bacterial risk while preserving the nutritional value.
Q: My cat licked some raw egg batter. Should I worry?
A: A single lick is very low risk. Just watch for vomiting or diarrhea over the next 24 hours. The concern with raw eggs is more about repeated, regular feeding than a one-time taste.
Alternatives
Simply cook the egg. A scrambled or hard-boiled egg (no seasoning) is an excellent protein-rich treat for cats that delivers all the benefits with none of the risks. Small pieces of cooked chicken or fish are other great protein options.
Risks & Disclaimer
If your cat ate a raw egg and develops vomiting, diarrhea, or fever, call your vet. A single raw egg exposure is unlikely to cause biotin deficiency, but the bacterial risk is immediate. If you've been feeding raw eggs regularly as part of a raw diet, discuss biotin supplementation with your vet.
