Assess the situation
Fill in what you know. Estimates are fine, exact numbers are better.
Emergency vet or poison control: which do I call?
Both resources exist for a reason, and in most cases you should use both. Here is how to think about the difference.
Go straight to an emergency vet if…
- Your dog is already vomiting repeatedly, weak, unsteady, or unresponsive
- It has been more than 2 hours since ingestion, so inducing vomiting at home is no longer reliable
- Your dog has known kidney disease or is a puppy, senior, or small toy breed
- You cannot reach a poison control line quickly and any amount was ingested
- A poison control consultation or your vet has told you to bring the dog in
Call poison control first if…
- Your dog just ate the grapes or raisins minutes ago and seems otherwise normal
- You need help deciding whether the amount is dangerous for your dog's specific weight
- You want a case number and treatment plan you can hand directly to your regular or emergency vet
- You are unsure whether to induce vomiting at home, which should only be done under professional guidance
How acute kidney injury develops
Symptoms often lag well behind the actual kidney damage. A dog can look completely fine for the first 12–24 hours while injury is already progressing internally, which is why waiting for visible signs is not a safe strategy.
Early gastrointestinal signs
- Vomiting (usually the first and most common sign)
- Diarrhea
- Loss of appetite
- Abdominal pain or a hunched posture
- Excessive drooling
- Lethargy
Silent progression
- Visible symptoms may pause or fully disappear
- Kidney values (creatinine, BUN) can already be rising on bloodwork
- This is the highest-risk window for owners to mistakenly assume the danger has passed
Acute kidney injury signs
- Increased thirst and urination, then decreased or absent urination
- Weakness or incoordination
- Bad breath with a chemical or ammonia-like odor
- Swelling of the limbs or abdomen
- Tremors or seizures in severe cases
- Collapse
Published case data behind these estimates
These figures come from veterinary toxicology literature and poison control case reviews. They describe the lowest doses at which reactions have been documented, not a line between "safe" and "dangerous."
| Reference point | Grapes | Raisins / currants |
|---|---|---|
| Lowest dose linked to kidney injury | ≈ 9–19.6 g/kg body weight | ≈ 2.8–3 g/kg body weight |
| Merck Veterinary Manual clinical marker | More than 1 grape or raisin per 10 lbs (4.5 kg) of body weight may carry meaningful renal risk | |
| Reported minimum fatal-range case | As few as 4–5 grapes in a small dog | A "handful" in some case reports |
| Relative concentration | Raisins are roughly 4–5 times more concentrated in toxic compounds than fresh grapes, gram for gram | |
Individual sensitivity varies enormously and is not fully understood. Some dogs have shown no signs after large ingestions while others reacted to a small handful. Treat every figure above as a floor of concern, not a ceiling of safety.