DanaC • May 26, 2008 12:28 pm
Title pretty much covers it :)
Dogs develop hemolytic anemia if they eat enough onions. I don't think that it matters too much
whether the onions are cooked or not. The quantity of onions required is high enough that dogs
can generally tolerate small doses of onions without any problem and moderate amounts of
onion without clinically apparent disease, even though there may be measurable changes on lab
test results. Cats are probably a little more sensitive to onion toxicity than dogs are. I can't find
an exact quantity of onions required to cause toxicity problems in dogs, but there are several
case reports of onion toxicity and they involve whole onions or sizable portions of chopped
onions (like a cup or more). I think that feeding dogs meat that has been cooked with onions is
pretty safe but you might want to avoid giving them the broth from around something like
pot-roast if there were a lot of onions used in the cooking, just to be safe.