Dairy
Kefir (plain, unsweetened)
Fermented milk drink containing live bacterial and yeast cultures, with less lactose than fresh milk.
AI-generated editorial illustration of the subject; not a photograph of a specific animal, product or case.
Who can eat it
DogsCats (small amounts, if tolerated)
Not suitable for
RabbitsGuinea pigsReptiles
Benefits
- Fermentation lowers lactose, making it easier to tolerate than milk
- Live cultures may support gut flora during recovery from mild digestive upset
- Palatable way to add moisture to food
Risks
- Flavoured, sweetened or fruit kefirs may contain xylitol or excess sugar
- Some animals remain sensitive even to fermented dairy
Preparation and serving
- Preparation
- Choose plain, unsweetened kefir and start with a small amount to check tolerance.
- Serving guidance
- A teaspoon for a cat or small dog, up to a few tablespoons for a large dog, a few times weekly.
Before offering kefir (plain, unsweetened)
- Check the exact animal and preparation: the listed suitability is Dogs; Cats (small amounts, if tolerated). A food being edible does not make it a complete diet.
- Follow the preparation advice: Choose plain, unsweetened kefir and start with a small amount to check tolerance. Do not substitute a seasoned or processed version and assume the same safety.
- Portion guidance: A teaspoon for a cat or small dog, up to a few tablespoons for a large dog, a few times weekly. For a pet on a prescribed diet, discuss extras with the vet first.
- If your pet develops vomiting, diarrhoea or discomfort, stop offering the extra and seek advice. Suspected poisoning or breathing difficulty needs immediate veterinary help.
Educational reference, not an individual diagnosis or a verified professional review. Read our editorial policy.
Guidance libraries and further reading
These organisations publish relevant guidance. Their links are further reading, not evidence that they have reviewed this page.
- WSAVA — global veterinary guidelines on nutrition, vaccination, pain and dental care
- PDSA — veterinary charity pet health advice
- International Cat Care — cat health, behaviour and welfare advice