Grape and Raisin Toxicity to Dogs

It has been said that grape and raisin consumption by dogs can be fatal due to renal failure. So according to this, what might be good for the dog’s owner is not always good for the dog.
However, Wendy and Dave have grape-eating dogs that show no ill-effects at all from Te Kauwhata organic grapes!
Maybe this would suggest that some of the viticulture chemicals are to blame?….
Well, we can leave that for the researchers to verify.