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Are tarantulas poisonous to cats?

Are tarantulas poisonous to cats?

September 16, 2023

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As a cat owner, you may be curious and concerned about the potential risks that other creatures in your home might pose to your furry friend. One such creature that has stirred a lot of curiosity is the tarantula. Are tarantulas poisonous to cats? This is a question that has been asked by many cat owners, especially those who also keep tarantulas as pets. This article delves into this matter, providing detailed information on the interaction between cats and tarantulas.

The Nature of Tarantulas

Are tarantulas poisonous to cats?

Tarantulas are large, hairy spiders belonging to the Theraphosidae family. They are known for their venomous bite, which they use primarily for hunting and self-defense. However, it’s essential to note that while all tarantulas are venomous, not all of them pose a significant threat to mammals such as cats.

Are Tarantulas Dangerous to Cats?

As stated earlier, all tarantulas are venomous. However, the level of toxicity varies from one species to another. According to Dr. Andrew Stolbach, a medical toxicologist at Johns Hopkins Hospital, most North American tarantulas possess venom that is relatively harmless to mammals.1 The primary purpose of their venom is to immobilize or kill small invertebrates – their main food source.

In contrast, certain types of tarantulas found in other parts of the world can have more potent venom. For instance, some South American and African species have venom that can cause severe pain and other symptoms in mammals.2

Effects of Tarantula Venom on Cats

If your cat gets bitten by a tarantula, it may experience some discomfort or pain at the site of the bite. Other possible symptoms include swelling, redness, and itchiness. In rare cases, a cat might exhibit signs of systemic poisoning such as lethargy, loss of appetite, or vomiting.3

Caring for Your Cat After a Tarantula Bite

If your cat has been bitten by a tarantula, it’s crucial to seek veterinary attention immediately. The vet will be able to examine the cat and determine the appropriate course of treatment. This may involve administering pain medication and anti-inflammatory drugs to alleviate symptoms. In severe cases, hospitalization may be required.

Preventing Tarantula Bites

  • Keep your tarantulas in secure enclosures: This is the most effective way to prevent any interaction between your pet cat and tarantulas.

  • Supervise your cat: If you let your cat roam freely in areas where tarantulas are present, always keep a watchful eye on them.

  • Educate yourself: Learn about the types of tarantulas in your area and their habits. This knowledge can help you protect your cat from potential harm.


In conclusion, while all tarantulas are venomous, not all are dangerous to cats. The severity of a tarantula bite depends on the species and the individual cat’s reaction. However, any bite should be taken seriously and veterinary attention sought immediately. As always, prevention is better than cure. Ensuring that your cats do not come into contact with tarantulas is the best way to keep them safe.

1 Stolbach, A., et al. (2015). Tarantula Envenomation. In Clinical Toxinology in Asia Pacific and Africa. Springer, Dordrecht.
2 Isbister, G. K., & Fan, H. W. (2011). Spider bite. Lancet (London, England), 378(9808), 2039–2047.
3 Fitzgerald, K. T., & Flood, A. A. (2006). Hymenoptera stings. Clinical Techniques in Small Animal Practice, 21(4), 194-204.

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