Can Dogs and Cats Eat Garlic?
By the VetVerdict team · Last updated October 18, 2026 · General information, not veterinary advice
Dogs
ToxicSeriousGarlic is roughly five times more potent than onion at damaging red blood cells, gram for gram, and can cause the same type of anemia.
Cats
ToxicSeriousCats should never be given garlic — their sensitivity to the compounds involved is even higher than dogs'.
Garlic belongs to the onion family
Garlic contains the same kind of compounds as onions, which can damage red blood cells and lead to anemia. By weight, garlic is commonly cited as being several times more concentrated than onion, which is why even modest amounts can matter for a small pet.
The "natural flea remedy" myth
Garlic is sometimes promoted online as a natural flea treatment or immune booster. Veterinarians generally advise against it: the evidence of benefit is weak and the risk to red blood cells is real. If fleas are a problem, ask your vet about a preventive designed for pets.
Garlic can also hide in garlic bread, seasoned meats, sauces, garlic salt and powder, and supplements. Cats are particularly sensitive.
Signs to watch for
- Lethargy and weakness
- Pale gums
- Drooling or vomiting
- Loss of appetite
- Reddish urine
- Rapid breathing
As with onions, signs can take a day or more to appear.
What to do
Call your vet or poison control, especially if your pet ate a supplement or a large amount of seasoning. If a product was involved, bring the label or bottle with you.
Safer alternatives
For flavor, use plain cooked meats, and rely on vet-recommended products for flea and tick control.
Frequently asked questions
Is garlic in dog food okay?
If a commercial pet food lists garlic, ask your vet whether it is a concern for your pet. The main risk comes from larger amounts in table food, seasonings and supplements.
Can garlic prevent fleas?
The evidence is weak and the risks are real. Talk to your veterinarian about flea preventives made for dogs and cats.