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RE: Adventures in Pet Sitting - Ask Aunt Deb! (Weekly Feature)
From what I understand, it's the tannins in the grape skins. Raisins are worse because drying the grapes concentrates the potency. Their livers cannot process that chemical.
Thanks. Not that we feed ours raisins, of course, but I was curious.
You're welcome. It's good info to know and pass along to folks who might not have heard that one.
Thanks for asking!