A. Unfortunately we don't understand the toxic dose for grapes. Some dogs eat them with no problems. Some go in to kidney failure after ingesting only a few. Based on this my best recommendation for you is to seek veterinary care as soon as possible. It may still be productive to get her to vomit, and then activated charcoal can be administered to absorb the toxin in the intestines. She'd likely also need baseline blood work to check kidney function, and possible some IV fluids. I wish I could be more specific for your situation but unfortunately we just don't know for sure, so we err on the side of caution.
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