Is Garlic Toxic to Cats and Dogs?
Garlic is severely toxic to cats and dogs — more concentrated than onion, it destroys red blood cells. Cats are especially sensitive. Call a vet.
Potentially life-threatening — treat any exposure as an emergency.
Potentially life-threatening — treat any exposure as an emergency.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Garlic?
Garlic is severely toxic to cats and dogs — more concentrated than onion, it destroys red blood cells. Cats are especially sensitive. Call a vet.
Also known as: garlic clove, garlic powder, allium sativum.
Symptoms to Watch For
🐕 In Dogs
- Red blood cell destruction leading to anemia
- Vomiting, diarrhea, and drooling
- Weakness and pale gums
- Dark or red-tinged urine
🐈 In Cats
- Red blood cell destruction (cats are highly sensitive)
- Vomiting, drooling, and reduced appetite
- Weakness and pale gums
- Dark or red-tinged urine
What to Do If Ingested
- Remove any remaining garlic.
- Note the amount and form (powder is most concentrated).
- Call a veterinarian or poison hotline.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- Any significant amount or garlic powder was eaten
- Weakness, pale gums, or lethargy
- Dark or red urine
Frequently Asked Questions
Frequently Asked Questions
Is garlic more toxic than onion?
Yes, gram for gram garlic is more concentrated in the toxic compounds (thiosulfates) than onion, so a smaller amount can cause harm. Both destroy red blood cells and cause anemia.
Is garlic powder dangerous?
Very. Garlic powder is highly concentrated, so even a small amount from seasoning can be a problem, especially for cats and small dogs. Treat it as seriously as raw garlic.
Is garlic good for fleas in pets?
No. The idea that garlic repels fleas is a myth, and garlic is toxic to dogs and cats. Giving garlic for flea control risks anemia with no proven benefit. Use veterinarian-recommended flea preventives instead.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-07-11