I'm not sure how I could make her throw up...?

I usually don't leave any food out where she can get it...I didn't think she could get this, but I was wrong obviously...it had been sitting there for a while now....not sure while she decided today to eat it. I'm pretty sure she's eaten choco before by accident and was fine...my grandmother feeds her dog chocolate as treats Anyway. You're right, it won't happen again. I hope she'll be ok...