Oregano is a popular herb in many kitchens, it has a strong aroma and various potential health benefits in humans. But when it comes to pets, especially dogs and cats, benefits depend on the form, the amount, and the species.
Oregano and Dogs
For dogs, small amounts of fresh or dried oregano are generally considered non-toxic. If your dog sneaks a bite of food seasoned lightly with oregano, there is usually no cause for alarm. In fact, oregano contains antioxidants and antimicrobial compounds that have been studied for potential benefits.
However, dogs do not process herbs the same way humans do. Their digestive systems are more sensitive, and oregano’s strong oils can cause problems when consumed in larger quantities.
“In dogs, oregano is not poisonous, but it should never be treated like a supplement without veterinary guidance,” says Dr. Lena Hartwell, DVM in “Is Oregano Safe for Pets?” published in the All About Pets website.
Possible side effects in dogs include:
- Mild stomach upset
- Vomiting or diarrhea
- Drooling or signs of nausea
These symptoms are more likely if a dog eats a large amount of oregano or consumes oregano oil, which is far more concentrated than the fresh or dried herb.
Oregano and Cats
Cats are a different story. While oregano is not considered highly toxic to cats, it is much more likely to cause adverse reactions. Cats lack certain liver enzymes needed to safely break down many plant compounds, including the essential oils found in oregano.
“Cats are especially sensitive to herbs that contain essential oils, and oregano is one of them,” explains Dr. Hartwell.
Even small amounts can lead to:
- Gastrointestinal irritation
- Vomiting
- Lethargy
- Loss of appetite
Some cats may be drawn to oregano because it is related to plants like catnip, but that does not mean it is safe for regular exposure or consumption.
What About Oregano Oil?
Oregano oil deserves special attention. Oregano essential oil is not safe for dogs or cats, whether ingested, applied to the skin, or diffused in enclosed spaces.
Essential oils are extremely concentrated and can overwhelm a pet’s system. In cats especially, exposure can lead to serious toxicity because their livers cannot properly metabolize the compounds.
“I see more problems from essential oils than from the herbs themselves. Oregano oil is a big one to avoid,” says Dr. Hartwell.
Signs of essential oil exposure may include:
- Difficulty breathing
- Tremors
- Weakness
- Chemical burns on the skin or mouth
Can Oregano Ever Be Beneficial?
Some pet supplements include oregano extract in highly controlled, veterinary-formulated doses, usually for antimicrobial support. This does not mean pet owners should add oregano to homemade meals or experiment with herbal remedies.
Dogs may tolerate tiny amounts better than cats, but neither animal truly needs oregano in their diet. There are safer, species-appropriate ways to support pet health.
What Should Pet Owners Do?
- If your pet accidentally eats a small amount of oregano:
- Monitor them for digestive upset
- Provide fresh water
- Contact your veterinarian if symptoms appear
If your pet ingests oregano oil or shows sudden symptoms, seek veterinary care immediately.
In Summary
- Dogs: Small amounts of oregano are usually safe, but not beneficial enough to recommend.
- Cats: Best avoided due to sensitivity and risk of adverse effects.
- Oregano oil: Unsafe for both dogs and cats.
Always take extra care and a few thoughtful steps to ensure every meal you serve is safe and nourishing.
About the Author: Niko Gabriel Salgado is a graduate of consular and diplomatic affairs from De La Salle College of Saint Benilde, and worked at the House of Representatives. He is now an entrepreneur and a volunteer of the animal welfare group Save Animals of Love and Light- Save ALL.
