How many raisins are toxic to a dog?

No toxic dose is established. Some dogs have developed kidney failure after a small handful while others ate more without signs, and there is no way to predict which dog is sensitive. Treat any amount as an emergency.

Are raisins worse than grapes for dogs?

Gram for gram, yes. Raisins are dried grapes, so the suspected toxin — tartaric acid — is more concentrated in each piece. A pocket-sized snack can equal a whole bunch of grapes.

My dog ate an oatmeal raisin cookie. What should I do?

Call your vet or a pet poison hotline now, with the packaging if you have it. Baked goods still count — the raisins inside are just as dangerous, and small dogs are at the greatest risk.

Can dogs eat sultanas or currants?

No. Sultanas and dried currants are made from grapes and carry the same kidney risk as raisins. Fresh currants (Ribes berries) are a different plant, but dried "currants" in baking are grapes.

Can Dogs Eat Raisins? Vet-Sourced Answer

Can Dogs Eat Raisins?

Toxic to dogs

No. Raisins are dried grapes and can cause acute kidney failure in dogs. There is no safe amount — even a few raisins can be dangerous.

Quick facts

Quick facts
Verdict	Toxic
Risky amount	No safe or toxic dose is established — treat any amount as a risk.
Key symptoms	Vomiting (often within 24 hours), Lethargy, Loss of appetite, Diarrhea, Increased or decreased urination
What to do	Treat any raisin ingestion as an emergency and call your vet immediately. Early decontamination and IV fluids can protect the kidneys — waiting for symptoms may be too late.

Why raisins are so dangerous

Raisins, sultanas and dried currants are dried grapes, and they can cause acute kidney injury in dogs. The leading suspect is tartaric acid, which varies widely between fruits — that variability is why one dog eats a boxful with no effect while another develops kidney failure after a few. Because drying concentrates everything in the fruit, raisins are considered even riskier per piece than fresh grapes.

There is no established safe or toxic dose, so vets treat every ingestion as potentially serious.

Where dogs actually find them

Most raisin poisonings come from baked goods and snacks, not the raisin box: oatmeal raisin cookies, raisin bran, pain aux raisins, fruitcake, hot cross buns and trail mix. If a stolen snack “may contain raisins,” treat it as if it did.

What to do if your dog ate raisins

Call your vet or an emergency clinic immediately, whatever the amount. If the ingestion was recent, the vet may induce vomiting and give activated charcoal, usually followed by IV fluids to protect the kidneys. Early treatment gives an excellent chance of full recovery; signs of kidney damage — vomiting, lethargy, changes in urination — mean the window is closing.

If your dog ate it

Treat any raisin ingestion as an emergency and call your vet immediately. Early decontamination and IV fluids can protect the kidneys — waiting for symptoms may be too late.

In the US you can also call the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee may apply).

Frequently asked questions

How many raisins are toxic to a dog?: No toxic dose is established. Some dogs have developed kidney failure after a small handful while others ate more without signs, and there is no way to predict which dog is sensitive. Treat any amount as an emergency.
Are raisins worse than grapes for dogs?: Gram for gram, yes. Raisins are dried grapes, so the suspected toxin — tartaric acid — is more concentrated in each piece. A pocket-sized snack can equal a whole bunch of grapes.
My dog ate an oatmeal raisin cookie. What should I do?: Call your vet or a pet poison hotline now, with the packaging if you have it. Baked goods still count — the raisins inside are just as dangerous, and small dogs are at the greatest risk.
Can dogs eat sultanas or currants?: No. Sultanas and dried currants are made from grapes and carry the same kidney risk as raisins. Fresh currants (Ribes berries) are a different plant, but dried "currants" in baking are grapes.