Cats are often drawn to strong, aromatic scents, including herbs like rosemary. But is this fragrant herb safe for them? Or is rosemary toxic to cats? The good news is that rosemary is not inherently toxic to cats. In small amounts, it’s generally safe and is even used in some cat foods and homemade treats to enhance flavor and appeal.
However, large amounts of rosemary can cause stomach upset or digestive issues, so moderation is key when offering it to your feline friend.
Is Rosemary Toxic to Cats?
Rosemary, according to the ASPCA, is not toxic to cats and can be safely offered in small amounts. It belongs to the Lamiaceae family, which also includes herbs like oregano, lavender, and mint—some of which can be harmful to cats. Thyme, another relative, is considered safe.
However, large amounts of rosemary can be toxic due to its volatile oils, such as camphor and linalool. These compounds require specific enzymes to be broken down—enzymes that cats lack—so overconsumption can lead to digestive upset or more serious health issues.
Can Cats Have Rosemary?
Cats can safely have small amounts of rosemary. It is generally safe in fresh, dried, or extract form, but rosemary oil should be avoided, as it is too concentrated and can be harmful.
When it comes to fresh rosemary, there’s usually little risk of overconsumption. Most cats will only take a small nibble, likely because of the herb’s strong aroma, which naturally limits how much they eat.
Benefits of Rosemary for Cats
Currently, there are no studies confirming specific health benefits of rosemary for cats. However, research in other animals offers some insights. For example, according to The Spruce Pets, rat trials suggest that rosemary may support conventional therapies for heart conditions like hypertrophy. Other animal studies indicate potential antioxidant, anti-inflammatory, neuroprotective, and antidepressant properties.
For humans, rosemary has a long history of use as a folk remedy for ailments such as headaches, stomachaches, epilepsy, rheumatic pain, muscle spasms, and memory issues.
For cats, the most reliable benefit of rosemary is scent enrichment. Its strong aroma can stimulate curiosity and activity, encouraging cats to roll, play, and explore. At this time, enrichment is the only guaranteed advantage of rosemary for felines, while potential health benefits remain speculative.
How to Safely Give Rosemary to Cats
There are several safe ways to offer rosemary to your cat:
Fresh sprigs: A small, washed sprig can be offered for nibbling.
Chopped in food: Finely chop a small amount and mix it into wet or dry food.
Play enrichment: Sprinkle a tiny amount on a scratching post or the floor to encourage rolling and play.
With treats: Serve alongside commercial cat treats, following the 10% rule—treats, including those with rosemary, should not make up more than 10% of your cat’s daily diet.
Always offer rosemary in small amounts and avoid concentrated forms such as essential oils, which can be harmful.
Rosemary and Cats: What If Your Cat Eats Too Much?
If your cat consumes too much rosemary, you may notice vomiting, diarrhea, lethargy, or a loss of appetite. Monitor your cat closely, and if these symptoms persist for more than 24 hours or escalate to severe lethargy or difficulty breathing, contact a veterinarian immediately.
Rosemary essential oil is much more dangerous. If your cat ingests even a small amount, symptoms can include tremors, drooling, seizures, and respiratory distress. In such cases, seek veterinary care as soon as possible.
Is Rosemary Oil Safe for Cats?
No—rosemary oil is not safe for cats in any form. It should never be applied topically, inhaled, or ingested, as it poses a high risk of poisoning.
Products such as flea sprays or diffusers may also contain rosemary oil and should be avoided unless specifically prescribed by a veterinarian.
Is Rosemary Extract Safe for Cats?
Yes — rosemary extract is generally considered safe for cats when used appropriately. It’s commonly used as a natural preservative in commercial cat foods and supplements. Regulatory bodies have evaluated its use, and when added in standard amounts, it doesn’t pose a health risk.
Aspect | Rosemary Extract | Rosemary Essential Oil |
What It Is | A mild concentrate made by extracting antioxidants and nutrients from rosemary leaves using safe solvents or natural methods. | A highly concentrated oil produced through steam distillation of rosemary leaves and stems. |
Primary Use | Natural preservative in cat foods, treats, and supplements; helps maintain freshness and flavor. | Used in aromatherapy, human cosmetics, and natural cleaners — not safe for cats. |
Concentration Level | Low — contains gentle amounts of active compounds. | Extremely high — concentrated camphor, cineole, linalool, and other compounds harmful to cats. |
Safety for Cats | Safe when used in small, regulated amounts in pet food. | Toxic to cats, even in small doses or when diffused into the air. |
How Cats May Encounter It | Through foods, treats, or supplements made by reputable pet brands. | Through diffusers, sprays, topical applications, or homemade remedies. |
Potential Benefits | Helps preserve food quality; may offer trace antioxidants. | None for cats — poses a risk of poisoning or respiratory irritation. |
Possible Side Effects | Rare, mild digestive upset if consumed in excess. | Vomiting, drooling, tremors, lethargy, breathing difficulty, or seizures. |
Veterinary Recommendation | Considered safe and useful when properly used in commercial pet products. | Avoid entirely; seek veterinary guidance if a cat is exposed. |
Other Herbs Cats Can and Can’t Have
Safe Herbs for Cats (in small amounts)
These herbs are generally considered safe when used in tiny, food-level quantities. Some may even provide mild digestive or aromatic benefits.
Cilantro – Safe; may help freshen breath.
Basil – Safe; offers mild antioxidant properties.
Thyme – Safe; often used in small amounts in pet foods.
Dill – Safe; gentle on digestion and aromatic.
Unsafe Herbs for Cats
These herbs contain essential oils or compounds that can irritate the stomach, affect the liver, or cause toxicity in cats. Avoid them in all forms — fresh, dried, essential oils, diffused, or in teas.
Mint – Contains essential oils that can upset a cat’s stomach.
Marjoram – Can cause digestive irritation and is toxic in larger amounts.
Oregano – Contains potent oils harmful to cats’ liver and nervous system.
Lavender – Toxic; can cause vomiting and respiratory irritation.
Tarragon – Contains estragole, which is unsafe for cats.
Garlic – Highly toxic; causes anemia even in small amounts.
Onions – Extremely toxic; damages red blood cells.
Lemongrass – Can cause vomiting and diarrhea; essential oil is very toxic.
Chives – Same family as onions; dangerous even in tiny quantities.
Chamomile – Some types can be toxic and cause skin or digestive issues.
Conclusion
Rosemary is a versatile herb that plays a useful role in many cat foods as a natural preservative, helping maintain freshness and quality. When used in its safe extract form, it poses minimal risk and may even offer mild antioxidant benefits. However, concentrated forms like rosemary essential oil are unsafe for cats and should be avoided in any part of their environment. Understanding the differences between forms and uses is essential for responsible pet care. By being aware of rosemary and cats, owners can ensure their pets enjoy the benefits of this herb safely, without exposure to harmful concentrations.
Frequently Asked Questions
Are cats allergic to rosemary?
Cats are not inherently allergic to rosemary. However, individual cats may develop sensitivities or mild reactions, so it’s best to introduce it gradually and observe for any signs of discomfort.
Is rosemary safe for cats (dried)?
Yes, dried rosemary is generally safe for cats when used in small amounts, such as in food or treats.
Do cats like rosemary?
Many cats enjoy nibbling on rosemary, likely due to its aroma and texture. Preferences may vary by individual.
Is fresh rosemary safe for cats?
Yes, fresh rosemary is safe in small amounts. Avoid giving large quantities, as it may cause mild digestive upset.
Can cats eat rosemary in homemade treats?
Yes, cats can enjoy rosemary in homemade treats, provided it is used sparingly and not in essential oil form, which can be toxic.
