Every dog is different. Individual allergies and sensitivities are common — always introduce new foods in small amounts and watch for adverse reactions. This site is for informational purposes only and is not veterinary advice. Always consult your vet.
The Full Picture
Plain, unsweetened kefir can be a beneficial addition to your dog's diet in small amounts. The fermentation process breaks down much of the lactose, making it easier to digest than regular milk. Kefir contains probiotics that can support gut health and digestion. However, it should be introduced gradually and in moderation — a tablespoon for small dogs and up to a couple of tablespoons for larger dogs. Some dogs may still experience digestive upset from the residual lactose or the richness of the drink. Avoid flavoured kefir, which typically contains added sugars, fruit, or artificial sweeteners. Always choose plain, full-fat kefir without additives.
What You Should Know
While kefir is not outright toxic, there are important precautions to bear in mind before sharing it with your dog. Portion size matters, and certain preparations or varieties may be unsafe. If your dog has any existing health conditions, check with your vet first.