Can dogs eat garlic?
Toxic. No. Garlic is the most concentrated of the alliums — Merck puts it at 3 to 5 times the toxicity of onion by weight.
Work out the dose for your dog
The amount matters as much as the food. The onion and garlic toxicity calculator for dogs takes your dog's weight and what it ate and returns the dose in mg/kg, with the severity band it falls into.
Open the onion and garlic toxicity calculator for dogs →If it has already been eaten
Your own vet, or the nearest 24-hour emergency animal hospital.
ASPCA Animal Poison Control Center: (888) 426-4435
Pet Poison Helpline: (855) 764-7661
Have ready: your dog's weight, the exact product and how much was eaten, and the time it happened.
How much is dangerous?
Merck states garlic is 3 to 5 times more toxic than onion. Dried garlic powder is more concentrated again, so a teaspoon of powder is not comparable to a clove.
Why it does harm
The same mechanism as onion. Sulfur-containing oxidants damage hemoglobin, producing Heinz bodies and hemolytic anemia. Garlic simply carries more of them per gram.
Sources
What to look for
- Vomiting and diarrhea early on
- Pale or yellow gums and weakness several days later
- Rapid breathing and rapid heart rate
- Discolored urine
Timing. Digestive signs within hours; anemia typically days later.
What to do
- Call your vet, and be specific about the form: fresh clove, powder, granules or an ingredient in a prepared dish.
- Ignore advice about garlic as a flea remedy. It has no established benefit and a documented toxicity.
Common questions
Is a small amount of garlic good for dogs?
No. Garlic has no established health or flea-repelling benefit for dogs, and Merck rates it 3 to 5 times more toxic than onion by weight.
Can dogs eat garlic bread?
No. Garlic bread combines garlic, often in powdered or butter form, with fat and salt. Call your vet with the amount and your dog’s weight.