The Internet is full of information about how onions (and to a lesser extent garlic) are poisonous to dogs and cats. I can find plenty of helpful advice about how these plants harm animals, the signs and symptoms, etc., and lots of warnings about not letting dogs and cats eat food with onion or garlic in it.
Of course, virtually every dish ever conceived by man has onion and/or garlic in it. And as any pet owner knows, animals get into human food from time to time. This stuff can’t be like plutonium or no pet that ever licked a dinner plate would live to old age. So what I want to know, and what I can’t find the answer to, is what level of exposure should cross the worry threshold?
I don’t want the “to be on the safe side” answer; I want the realistic answer.