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Raisin and Grape Toxicity in Dogs

This page focuses on raisin and grape toxicity in dogs. Are raisins and grapes poisonous to dogs? Yes! They can cause kidney failure in dogs. Read on and find out more.

Grape Toxicity in Dogs

Besides chocolate, raisins and grapes are also poisonous to dogs. However, some dog parents are unaware of this fact until it is too late.

A mere handful of raisins or grapes can cause a lot of damage to some dogs. In large quantities, raisins or grapes can cause acute kidney failure and even death to dogs.

Any brand of raisins and all kinds of grapes (seeded, seedless, those from a grocery store, or those from your backyard vine) can cause poisoning. The amount of grapes or raisins that can cause a dog to become sick varies considerably - from a single serving to a whole pound of raisins.

Raisin and Grape Toxicity in Dogs - Why Are They Poisonous?

The exact reason as to why raisins or grapes cause acute kidney failure in dogs is still not clear.

The ASPCA Animal Poison Control Center have conducted tests on suspected grapes and raisins for pesticides, heavy metals, and fungal contaminants. However, the results so far have all been negative.

Without a clear understanding as to how raisins and grapes cause toxicity in dogs, and since even small amount can cause serious health problems, all cases of ingestion should be considered potentially dangerous.

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Raisin and Grape Toxicity in Dogs - Symptoms

Early symptoms of grape toxicity in dogs (within about six hours of eating grapes or raisins) include:
  • Vomiting and diarrhea (Partially digested grapes or raisins may be seen in the vomit, fecal material or both)
  • Loss of appetite
If no treatment is received in about 24 hours, the dog will continue to show the above symptoms. In addition, he will:
  • Become lethargic and depressed
  • Be excessively thirsty
  • Show signs of abdominal pain
If treatment is not sought immediately, acute kidney failure can develop within the first 72 hours. When the kidneys fail, the body is unable to filter the blood and excrete waste in the urine. The dog will produce very little urine. Once the dog stops urinating, death occurs.

Sometimes, even with treatment, too much damage has already been done and the dog has to be euthanized.

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Raisin and Grape Toxicity in Dogs - First Aid Treatment

If you notice that your dog has just eaten some grapes or raisins, induce vomiting and administer activated charcoal immediately to prevent absorption of potential toxins. After that, take your dog to the vet for tests and further treatment will be given to your dog if necessary.

To induce vomiting, make a 50/50 mix of hydrogen peroxide and water and pour between a teaspoon and a tablespoon, depending on the size of your dog, down his throat. If it does not work within five minutes, repeat the procedure, but do it no more than three times.

After your dog has vomited, give him granular activated charcoal. Mix five heaping teaspoons of granules in one cup of water. The dosage is 1 teaspoon for dogs under 25 pounds and 2 teaspoons for dogs over 25 pounds.

If some time has already passed before you notice that your dog has ingested raisins or grapes, rush him to the vet immediately.

If you are in the USA, you may also want to call the ASPCA Animal Poison Control Center hotline (888-426-4435) for help.



Related Topics

Dog First Aid
Dog Poisoning Substances

References

Pitcairn and Pitcairn, Dr. Pitcairn's Complete Guide to Natural Health for Dogs and Cats (Rodale, 2005).
Tedaldi, J., What's Wrong with My Dog? (Fair Winds Press, 2007).
College of Veterinary Medicine, University of Minnesota (http://www.cvm.umn.edu/newsandevents/facts/petsafety/Grapes/index.htm).

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