"STRANGE FRUIT?" - A REPORT ON CASES OF CANINE KIDNEY FAILURE FROM GRAPES AND RAISINS
APRIL 2010 - In response to reports of dogs developing kidney failure after eating large amounts of grapes or raisins, the Animal Poison Control Centre conducted a review of all related cases in its database.
Veterinary toxicologists found that all of the companion dogs developed vomiting within six hours of ingestion; the estimated amounts of grapes or raisins eaten ranged from nine ounces to two pounds. Other commonly reported signs included diarrhea, anorexia, lethargy and abdominal pain, and all of the dogs developed evidence of kidney dysfunction.
"Whether the ingested grapes were purchased fresh, didn't seem to matter, nor did the brand eaten."
ANIMAL POISON CONTROL CENTRE REPORT
Clinical signs lasted for several days, sometimes even weeks. And after aggressive treatment, which included intravenous fluids and medications, half of the dogs recovered, while the others died or had to be euthanised.
At present, the exact role of grapes or raisins in these cases - what exactly is the toxic component - is still unclear. But a dog who has ingested large amounts can now be diagnosed and treated successfully. The first line of defence is decontamination, and the dog should be hospitalised and placed on IV fluids.
If the blood work appears normal after three days, it's unlikely that kidney failure will occur; if there is evidence of renal failure, more aggressive treatment - including fluids, medication and possibly dialysis - is called for.
If you suspect that your dog has ingested large quantities of raisins or grapes - or any other potentially dangerous substance - call your vet immediately!