Unfortunately we had a bad dog sitter earlier this year when we were at my fathers funeral who fell asleep while watching my Belle and she ended up eating some of our aloe vera plant which is toxic to docs.
When I called our vets office, which is also an Animal hospital, they told us to give her hydrogen pyroxide immediately to induce vomiting. She threw up what she ate in no time and luckily was just fine. Here is a link...
How to Induce Vomiting (Emesis) in Dogs
I hope all is well. Please post and let us know.