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
Fresh oregano in small culinary amounts is generally safe for dogs. It contains antioxidants and has mild antibacterial properties. Unlike rosemary, which is widely used in commercial dog foods, oregano should be used more sparingly. Consuming large amounts can cause gastrointestinal upset including vomiting and diarrhoea. Oregano essential oil is too concentrated and should never be given to dogs — it can cause liver damage and irritation to the mouth and digestive tract. The ASPCA lists oregano as mildly toxic to dogs in large quantities. For digestive support, ginger is a safer herb option for dogs.
What You Should Know
While oregano 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.