Posted: Mar 31, 2008 8:29 am
theresa, grapes are well known to give dogs renal failure. every dog is different, but if your dog eats more than say 5 grapes i would take them to the doctor.
with garlic and onions, onions are the worse of the two and they contain thiosulfate. this can add up in the body to cause hemolytic anemia. it may take a while for adverse effects to show, so you won't see warning signs (such as vomiting) right away. while its true that some dog foods (eg purina) use garlic as an ingredient in their foods, they not only use a low amount but they remove thiosulfate (the offending ingredient) from it first. that said, it would take a LOT of garlic to actually kill your dog, but why even take the risk?
just because you don't see the damage from feeding your animal these things doesn't mean its ok (oops double negative). i worked at a vet hospital and you can believe we saw cases like this come in often.
also saw many animals come in stoned out of their minds from getting into the owner's stash...