Can Dogs Eat Grapes? No, and There Is No Safe Number

Grapes and Raisins are toxic to dogs. Merck Veterinary Manual puts the first-harm dose at more than one grape or raisin per 4.5 kg (10 lb) of bodyweight. Getting a pet seen after eating grapes and raisins costs $85 to $150 — that is the visit itself, not the treatment. Fluids, hospitalisation and monitoring for a serious case are on top of it, and can run into the thousands.

Why grapes and raisins comes up at all

Tartaric acid is an organic acid present in high concentrations in grapes, raisins and tamarinds. Dogs lack the organic acid transporters other species have, so they excrete it poorly and it accumulates in the proximal renal tubular cells - which is why a fruit humans eat by the bowlful destroys a dog's kidneys. Affected dogs develop oliguric or anuric renal failure, generally within 72 hours. What makes this food genuinely different from the other toxins on this site is that there is no reliable dose-response: the tartaric acid content of the fruit varies, so identical amounts produce different outcomes in different dogs, and no amount can be called safe. The identification of tartaric acid is recent - it came out of case reports of dogs poisoned by cream of tartar and tamarind, which is also why the hazard list is wider than fruit. Cases reported to date have been in dogs; there are anecdotal reports of renal failure in cats and ferrets after eating grapes, but no published case reports in those species, which is why this record is scoped to dogs rather than being called safe for cats.

How much grapes and raisins is dangerous

Harm from grapes and raisins starts at more than one grape or raisin per 4.5 kg (10 lb) of bodyweight, and gets worse from there. Every figure below is quoted from Merck Veterinary Manual in its own units — we do not convert them into portions, because the conversion depends on the specific product and getting it wrong in either direction is dangerous.

What to do if your pet ate grapes and raisins

In this order. Step one first — the steps below are sequenced, not a menu, and the first one is what decides whether the rest of the evening is a phone call or a car journey.

1. Act on the exposure, not on the symptoms

   Most dogs vomit within 6-12 hours, but kidney failure declares itself at 24-72 hours, by which point the damage is done. The whole treatment window sits before the dog looks unwell.

2. Call your vet, an emergency clinic, or a poison control hotline immediately

   ASPCA Animal Poison Control is on (888) 426-4435 and Pet Poison Helpline on 855-764-7661, 24/7. Both charge a fee - Pet Poison Helpline publishes $89 per incident including all follow-up consultations, and the ASPCA states that a consultation fee applies. Tell them the type of fruit, the amount and your dog's weight.

3. Have decontamination done properly and early

   Merck's recommended treatment for a dog that is still clinically normal is prompt gastrointestinal decontamination, with emesis induced using a licensed drug - ropinirole, apomorphine, or 3% hydrogen peroxide at 1-2 mL/kg to a maximum of 45 mL. The efficacy of activated charcoal here is unknown, so it is not the mainstay.

4. Expect at least 48 hours of intravenous fluids if the amount was significant

   Merck: with ingestion of a large quantity, or where diarrhoea has developed spontaneously within 12 hours, diuresis with aggressive IV fluid therapy for a minimum of 48 hours is recommended, with renal function and fluid balance monitored throughout. That is a hospital stay, not an outpatient visit.

5. Do not wait to see whether your dog is one of the lucky ones

   There is no way to predict which dogs are affected, because the tartaric acid content of the fruit varies. Once anuric renal failure develops, Merck notes most dogs die or are euthanised, and survival then depends on peritoneal dialysis or haemodialysis with a prognosis that is still guarded.

Signs of ingestion, and when they show up

Onset windows matter as much as the signs themselves: an animal that looks fine an hour in has not told you anything yet if the window runs longer than that.

Vomiting or diarrhoea

Within 6-12 hours of ingestion in most affected dogs

Lethargy, loss of appetite, abdominal pain, weakness

Following the gastrointestinal signs

Dehydration, excessive thirst, tremors or shivering

As kidney injury develops

Producing little or no urine - oliguric or anuric kidney failure

Within 24-72 hours of exposure

What it costs if it goes wrong

A grapes and raisins exposure is only free if you do nothing, and doing nothing is not the advice above. These are the prices our own dataset carries for the care this ends in.

Veterinary Urgent Care Visit cost by region, and how each row was sourced

This is the same regional table the veterinary urgent care visit cost page renders, from the same record. Read the basis column first.

What else can land on the same invoice

• Routine Vet Checkup (Wellness Exam) — $56 to $130, with $66 typical. The annual physical examination a healthy dog or cat gets - vitals, ears, eyes, mouth, coat and skin - priced as the exam fee alone, before any test or vaccine is added to the bill. See what a routine vet checkup (wellness exam) costs by region

Insurance and the bill

A veterinary urgent care visit after a grapes and raisins exposure is normally covered by a standard accident-and-illness policy — poisoning is an accident, and it is the textbook claim these policies exist for. Unlike a wellness visit, an urgent care visit for an actual illness or injury is a normal illness claim under a standard accident-and-illness policy - subject to the annual deductible, the reimbursement percentage, any waiting period and any pre-existing-condition exclusion. The catch sits precisely on the number this page is about: several carriers exclude the examination fee itself while paying for everything done during the visit. Trupanion and State Farm both list examination fees, including specialist and emergency exam fees, among their exclusions; Healthy Paws covers everything but the exam fee; Figo sells exam-fee coverage as a paid add-on rather than including it in the base plan. So the $85-$150 that brought you through the door may be the one line your policy will not touch.

What you would get back: 70-90% of the covered portion after the annual deductible on a standard accident-and-illness plan. The exam fee itself is excluded by several major carriers, so expect reimbursement on the diagnostics and treatment rather than on the visit fee.

The bill this page is about is $85 to $150 before anything is treated, and a poisoning that goes badly runs into four figures. Waiting periods are the part that decides whether a policy pays at all, and they differ enough between carriers that the only useful answer is a side-by-side: our pet insurance comparison for veterinary urgent care visit costs shows which policies pay for it, how long the waiting period runs, and what counts as pre-existing.

What to do with a threshold you cannot rely on

The figure in the dose table is a risk threshold, and it behaves unlike every other number on this site. It does not describe a dose-response curve, it is not an LD50, and the fruit's tartaric acid content varies — so a dog can be affected below it and unaffected above it.

That has one practical consequence, and it is the point of this page. Coming in under the number changes nothing about what you do.

On every other toxic record here, working out the amount tells you whether this is a phone call or a car journey. On this one, the amount tells the clinic how aggressive to be and tells you nothing at all about whether to ring.

So the arithmetic still matters — do it, and have the weight ready — but do it on the way to the phone rather than instead of it.

Raisins are the exposure, grapes are the search term

A bowl of grapes on a table is a visible, countable event. Almost nothing else about this poisoning is.

Raisins are dry, so a mouthful of them is a great deal more fruit than a mouthful of grapes, and they travel inside foods that nobody thinks of as fruit: cereal bars, oat cookies, fruit loaf, trail mix, muesli, hot cross buns, mince pies, Christmas cake, and the small boxes handed out at children's parties.

That changes what you should be looking for after the fact. If a dog is unaccountably unwell and something baked went missing, read the ingredient list of the thing that went missing rather than trying to remember whether there were grapes in the house.

It also changes the prevention. Grapes get put away deliberately; a half-eaten flapjack does not.

Cream of tartar, tamarind, and the playdough on the kitchen table

The hazard list is wider than fruit, and this is the part almost nothing else on this search result covers. The case series that identified tartaric acid as the likely culprit came from dogs poisoned by cream of tartar and by tamarinds — neither of which is a grape.

Cream of tartar is a baking ingredient. It is in snickerdoodles, in meringue, in some frostings, and in most homemade playdough recipes, which puts it on a low table in a house with a toddler and a dog for hours at a time.

Tamarind is in brown sauce, in pad thai, in chutneys and in tamarind sweets.

None of this means a lick of frosting is an emergency. It means that when a dog develops the picture in the symptom list above and there were no grapes in the house, the answer may still be in the kitchen — and it is worth mentioning both ingredients on the phone rather than ruling the whole category out.

Is a currant a grape?

Usually, yes — and that is a labelling trap rather than a botanical curiosity. Zante currants are dried grapes, in the same Vitis genus as everything else on this page, and they are what "currants" means in most British baking.

True currants of the genus Ribes — blackcurrants, redcurrants — are a different plant and are not implicated.

The practical rule: if it came out of a packet in the dried fruit aisle, treat it as a raisin. If it came off a bush in the garden, it is a different question and worth naming precisely when you call.

Does this apply to cats?

Not on the published evidence, and the honest version of that is more useful than a yes or a no. Every reported case has been in dogs. There are anecdotal reports of kidney failure in cats and ferrets after eating grapes, and no published case reports in either species.

So this record is scoped to dogs because that is where the evidence is — not because grapes have been shown to be safe for anything else.

A cat that has eaten grapes is still worth a call. The absence of case reports is thin ground to stand on when the failure mode is a kidney.

What if you only find out days later?

Ring anyway, and say when. Kidney injury declares itself over the first one to three days, so a late discovery is not the same as a lost cause — it changes what the clinic is looking for rather than whether it is worth looking.

What changes is that decontamination is no longer the conversation. Bloods and fluid therapy are, and the clinic needs the date to know where in the course the animal sits.

Be specific about the timeline even when it is embarrassing. "Sometime on Saturday, we think a handful" is more useful than "recently", and nobody is grading you on it.

If the dog is producing very little urine, say that first. It is the sign in the list above that carries the worst prognosis, and it changes the urgency of everything else.

Grape juice, wine and vine leaves

Juice is the fruit with the water left in and the fibre taken out, so a dog can take in a lot of it quickly and voluntarily. It sits in the same hazard family as the fruit and appears in the record's own list of other names.

Wine adds alcohol, which is a separate hazard we hold no record for and which would be worth naming to the hotline in its own right.

The plant is a further question again. Our record and its source are written about the fruit, the dried forms and the tamarind and cream-of-tartar route — not about vine leaves — so if leaves are what was eaten, say leaves rather than letting "grapes" stand in for it.

What makes this one harder to judge than the other four

Every toxic record on this site is hard for a different reason, and knowing which kind of hard you are in tells you what to do with the first quiet hour.

• Grapes and raisins — no reliable dose response. There is no number to be reassured by, and the treatment window sits entirely before the dog looks unwell.
• Chocolate — the dose is invisible until you identify which product it was, and the signs run late.
• Onions and garlic — the damage runs for days before it shows, so a bright dog the next morning proves nothing.
• Mushrooms — the species is the unknown, and there is a false-recovery phase that sends owners home early.
• Xylitol — it hides in products that are not food, and a slow-absorbing one can stay silent for most of a day.

The dose thresholds for all of them, and the vet bill attached to each, are on the food safety index.

Common questions

Other foods, and where they land

• Chocolate — toxic. Merck Veterinary Manual puts the first-harm dose at 20 mg of methylxanthines per kg of bodyweight. The next rung up is 40-50 mg/kg.
• Mushrooms — toxic. Merck Veterinary Manual puts the first-harm dose at 0.5 mg of methyl-gamma-amanitin per kg of bodyweight. The next rung up is A lethal dose of amanitins, or pieces of Amanita phalloides.
• Onions and Garlic — toxic. Merck Veterinary Manual puts the first-harm dose at 5 g of raw onion (cats) - or less than a teaspoon of cooked onion per kg of bodyweight, for cats. The next rung up is 15-30 g/kg of raw onion, in dogs.
• Xylitol — toxic. Merck Veterinary Manual puts the first-harm dose at more than approximately 100 mg of xylitol per kg of bodyweight (45 mg/lb). The next rung up is more than 500 mg/kg (227 mg/lb).
• Avocado — safe in limits.
• Beetroot — safe.
• Cinnamon — safe in limits.
• Corn — safe in limits.
• Cucumber — safe.
• Green Beans — safe.
• Marshmallows — safe in limits.
• Oranges — safe in limits.
• Papaya — safe in limits.

The full list, grouped by verdict, is on the food safety index.

Sources

1. Grape, Raisin, and Tamarind (Vitis spp, Tamarindus spp) Toxicosis in Dogs — Merck Veterinary Manual, 2026.
2. Grapes — Pet Poison Helpline, 2026.
3. Raisins — Pet Poison Helpline, 2026.
4. People Foods to Avoid Feeding Your Pets — ASPCA Animal Poison Control Center, 2026.
5. Pet Poison Helpline - incident fee and 24/7 contact — Pet Poison Helpline, 2026.