is it safe for cats to eat spiders?
Generally, eating common house spiders is not harmful to cats, but certain venomous species like black widows or brown recluse spiders can pose a significant health risk.
- 1Most common household spiders in the US are non-toxic to cats and cause no ill effects if ingested.
- 2Venomous spiders, such as the Black Widow (Latrodectus mactans) and Brown Recluse (Loxosceles reclusa), can cause severe illness or death if bitten or ingested.
- 3Ingestion of any spider, even non-venomous ones, can occasionally lead to mild gastrointestinal upset like vomiting or diarrhea due to the chitin in their exoskeletons.
- 4Symptoms of a venomous spider bite in cats can include muscle tremors, pain, swelling, lethargy, fever, and in severe cases, neurological signs or organ damage.
Detailed Answer
Cats are natural predators and may hunt and eat spiders. For the vast majority of common household spiders found in the United States, ingestion is harmless. These spiders are not venomous enough to cause systemic toxicity in felines, and at most, a cat might experience mild gastrointestinal upset, such as vomiting or diarrhea, from consuming the chitinous exoskeleton.
However, a significant danger arises from venomous species like the Black Widow (Latrodectus mactans) and Brown Recluse (Loxosceles reclusa). Black Widow venom is a neurotoxin that can cause severe muscle pain, tremors, paralysis, and respiratory distress. Brown Recluse venom is a cytotoxic agent that can lead to tissue necrosis, open wounds, and secondary infections. If a cat ingests or is bitten by one of these spiders, symptoms can range from localized pain and swelling to systemic signs like lethargy, fever, loss of appetite, and in severe cases, organ damage or death.
Warning: If you suspect your cat has eaten or been bitten by a venomous spider, seek immediate veterinary attention. Prompt treatment is crucial for a positive outcome. Always identify the spider if possible to aid in diagnosis and treatment.
Published: July 4, 2026