Wow, this thread has helped me as well. I didn't know grapes and onions were something one should not feed their dog. I never give Belle an onion because she won't accept them. But I had given her a couple grapes once and she threw up that night. And one time I dropped a grape without knowing it and she, of course, went and picked it up and was throwing up that night. So that explains it. They say not to give your dog chocolate because it's not good for them, but one time our dog got up and ate a dozen choclate cookies and four chocolate bars one night while we were out and she was just fine. So I think it's something some dogs can handle more then others. Pretty irresponsible of us but we never thought about putting stuff away because this was when we had Princess and Princess NEVER got into anything so it never crossed our mind to, but after that it certainly did.