Is Basil Poisonous to Dogs?

Basil (Ocimum basilicum) is listed by the ASPCA as non-toxic to dogs, so the leaves themselves do not contain a poisonous principle. That said, "non-toxic" does not mean "unlimited." Feed only plain, fresh or dried basil leaves with nothing added. Avoid pre-made pesto, seasoning blends, or sauces, which commonly contain garlic and onion (both toxic to dogs and damaging to red blood cells), as well as added salt, oils, and fats that can cause GI upset or, in fatty form, contribute to pancreatitis. Even a wholly safe plant can cause mild, self-limiting vomiting or diarrhea if a dog eats a large amount of plant material, because the fiber is hard to digest; introduce it in small quantities. Whole stems or tough sprigs are a minor choking/GI obstruction risk for small dogs, so chop or tear leaves. Ensure any basil from a garden or store is free of pesticides, herbicides, fungicides, or fertilizer residue, and rinse before offering. Basil is an herb, not a sweetened or processed food, so xylitol is not an inherent concern, but never offer basil-flavored human products (e.g., flavored waters, candies, or baked goods) that could contain xylitol or other additives. If your dog has a sensitive stomach, a known food allergy, or a chronic illness, check with your veterinarian before adding any new food.

Can dogs eat fresh basil leaves?

Yes. The ASPCA classifies basil (Ocimum basilicum) as non-toxic to dogs, so plain fresh or dried basil leaves are safe in small amounts. Offer them washed, chopped, and on their own, without sauces, oils, garlic, or onion.

Is pesto or basil sauce safe for dogs?

No. While the basil itself is non-toxic, most pesto and basil sauces contain garlic and onion, which are toxic to dogs and can damage red blood cells, plus high salt, fat, and oil that can cause stomach upset or pancreatitis. Stick to plain basil leaves only.

What happens if my dog eats a lot of basil?

Basil is not poisonous, but eating a large amount of any plant can cause mild, temporary vomiting or diarrhea because plant fiber is hard to digest. Signs are usually self-limiting; if vomiting or diarrhea is persistent or your dog seems unwell, contact your veterinarian.

• ASPCA Animal Poison Control - Basil (Toxic and Non-Toxic Plants)

Last updated 2026-06-25