Dog Ate Grapes in San Jose — What to Do Right Now
Grapes and raisins are among the most unpredictable toxins for dogs. Some dogs eat a handful with no problems. Other dogs eat one or two and develop life-threatening kidney failure. There is no reliable safe dose, no way to predict which dogs will react, and no antidote. The treatment is to act fast — bring your dog in for decontamination before symptoms start, ideally within 2 hours of ingestion. ArchVet Winchester is open until 10 PM daily for grape ingestion emergencies.
Why grapes are different from other toxins
Most toxins have a known dose-response — eat this much and this happens. Grapes do not. The toxic ingredient was identified relatively recently (likely tartaric acid), but individual dog sensitivity varies wildly. A 70-pound dog has died from a small handful. A 15-pound dog has eaten a whole bag with no kidney damage. Because we cannot predict which dog is which, we treat every grape ingestion as a real exposure. Raisins are concentrated grapes and even more dangerous per piece.
What to do in the first hour
Step 1: Note the time of ingestion, count or estimate how many grapes or raisins, identify the type (table grapes, currants, sultanas, raisin bread, trail mix, baked goods). Step 2: Call ArchVet Winchester at (669) 230-5034 — we will tell you to come in. Step 3: Drive — do not try to make your dog vomit at home with hydrogen peroxide unless the vet specifically tells you to (incorrect doses cause stomach ulcers). Step 4: Bring the packaging and any leftover product.
What we do on arrival
If ingestion was within 2 hours we induce vomiting under medical supervision (much safer than at-home induction), give activated charcoal to bind any remaining toxin, start IV fluids to protect the kidneys, and pull baseline kidney bloodwork (BUN, creatinine, SDMA). Most dogs are then hospitalized on IV fluids for 24 to 48 hours with repeat kidney values to make sure no damage is developing. If we miss the early window or the dog is already showing signs, treatment is more aggressive and outcomes are worse.
Symptoms of grape toxicity
Vomiting (often within a few hours), diarrhea, lethargy, decreased appetite, increased thirst, decreased or absent urination, abdominal pain, weakness, and in severe cases seizures. Kidney failure typically shows up 24 to 72 hours after ingestion. By the time symptoms appear, kidneys may already be damaged — which is why early decontamination matters so much.
Other places grapes hide
Raisin bread, hot cross buns, currant scones, trail mix, granola bars, fruit cake, oatmeal cookies with raisins, dried fruit mixes, certain chutneys and dips, and grape juice or wine spills. Watch for these on counters and in lunchboxes — many of our cases come from a kid leaving a granola bar wrapper on the floor.
Cost expectations
A grape ingestion visit at ArchVet (decontamination plus activated charcoal plus baseline bloodwork plus a few hours of fluids) typically runs $400 to $800. Hospitalization on IV fluids for 24 to 48 hours pushes that to $1,200 to $2,500. Treating active kidney failure costs significantly more and outcomes are unpredictable. The early decontamination visit is by far the cheapest and most effective option.
Advanced veterinary care in San Jose
ARCH Veterinary provides advanced care for pets across San Jose and the surrounding South Bay, with urgent care, emergency medicine, surgery, CT imaging, ultrasound, and hospitalization all under one roof. Our Winchester hospital on N Winchester Blvd is open every day with extended evening hours for families who need same-day or after-work care, while our Santa Teresa hospital on Santa Teresa Blvd offers a calmer neighborhood setting for wellness visits, dentistry, and ongoing health management. Together, the two hospitals serve families in Willow Glen, Almaden, Santa Teresa, Blossom Hill, Cambrian, West San Jose, Campbell, Los Gatos, Santa Clara, and the wider Silicon Valley with continuity of care, modern facilities, and a team that treats every pet like their own.
Frequently asked questions
How many grapes are toxic to dogs?
There is no known safe dose. Some dogs react to one or two grapes, others eat handfuls with no problem. Treat any ingestion as an emergency.
Should I make my dog vomit at home?
Only if you cannot reach a vet within an hour and the vet on the phone walks you through the dose. At-home hydrogen peroxide induction can cause stomach ulcers if dosed incorrectly. Coming in is safer.
Are raisins worse than grapes?
Per piece, yes — raisins are concentrated. Watch for raisin bread, trail mix, and baked goods.
How fast do symptoms appear?
Vomiting can start within hours. Kidney failure typically develops 24 to 72 hours after ingestion. Early decontamination prevents most damage.