Dog Owners Beware: Raisin & Grape Toxicity

If you own a dog, you may not be aware that giving your dog as few as 7 raisins or grapes can be extremely toxic causing renal failure.

After I received an email regarding this, I did some investigating and found it to be true. If a dog eats raisins or grapes, aggressive treatment is needed as well as fluids and close monitoring for survival.

Be careful leaving raisins and grapes in places where your dog can help themselves to these delicious treats.If you suspect your dog did ingest raisins or grapes, contact your vet immediately.

Also toxic to dogs are onions, chocolate and macadamia nuts. Chocolate contains Theobromine. This chemical is used to make all kinds of chocolate and can also be found in cocoa mulch, which is sold in garden stores. This is lethal to not only dogs, but to cats as well. Please read the ingredients of your mulch purchase before using outdoors.

See below the email I received and a link to snopes to read further.

Written by:
Laurinda Morris, DVM
Danville Veterinary Clinic
Danville , Ohio

This week I had the first case in history of raisin toxicity ever seen at MedVet. My patient was a 56-pound, 5 yr old male neutered lab mix that ate half a canister of raisins sometime between 7:30 AM and 4:30 PM on Tuesday. He started with vomiting, diarrhea and shaking about 1AM on Wednesday but the owner didn't call my emergency service until 7AM.

I had heard somewhere about raisins AND grapes causing acute Renal failure but hadn't seen any formal paper on the subject
We had her bring the dog in immediately.

In the meantime, I called the ER service at MedVet, and the doctor there was like me - had heard something about it, but.... Anyway, we contacted the ASPCA National Animal Poison Control Center and they said to give I V fluids at 1 1/2 times maintenance and watch the kidney values for the next 48-72 hours.

The dog's BUN (blood urea nitrogen level) was already at 32 (normal less than 27) and creatinine over 5 ( 1.9 is the high end of normal). Both are monitors of kidney function in the bloodstream. We placed an IV catheter and started the fluids.

Rechecked the renal values at 5 PM and the BUN was over 40 and creatinine over 7 with no urine production after a liter of fluids. At the point I felt the dog was in acute renal failure and sent him on to MedVet for a urinary catheter to monitor urine output overnight as well as overnight care.

He started vomiting again overnight at MedVet and his renal values have continued to increase daily . He produced urine when given lasix as a diuretic. He was on 3 different anti-vomiting medications and they still couldn't control his vomiting.

Today his urine output decreased again, his BUN was over 120, his creatinine was at 10, his phosphorus was very elevated and his blood pressure, which had been staying around 150, skyrocketed to 220.. He continued to vomit and the owners elected to euthanize.

This is a very sad case - great dog, great owners who had no idea raisins could be a toxin. Please alert everyone you know who has a dog of this very serious risk.

Poison control said as few as 7 raisins or grapes could be toxic. Many people I know give their dogs grapes or raisins as treats including our ex-handler's. Any exposure should give rise to immediate concern.

Snopes article