Most studies suggest that the toxic dose is about 32 grams per kilogram of the dog's weight for grapes and 11 - 30 grams for raisins,
however symptoms of poisoning can sometimes be present even at very low doses.
Not exact matches
However, there are often no overt
symptoms of lead
poisoning.
There has been a significant increase in weed
poisoning (as well as dogs licking tables after owners have snorted cocaine etc...),
however the
symptoms of walking drunk may be attributable to many different causes including infections (particularly ears), other
poisoning, head trauma, vestibular disease, liver failure, kidney failure among other causes.
The
symptoms you describe are quite vague as they correlate to hundreds
of possible causes;
however, with the quick onset
of symptoms and short timeline I would guess that
poisoning is a strong cause as most causes
of death (like infections or internal disease) normally take days to show
symptoms.