Ive had more than 15 dogs total on my life. And I can tell you that if she vomits grass is because she has worms (best translation to english I could find), or just bacteria on her stomach. You can easily treat this giving her coconut juice, which supplies most of the vitamins and nutrients she needs, as well as has a chance of eliminating the bacteria. And also gives her enough energy to eat again.
If it doesnt work, give her the right dosage of medicine to kill the worms (really a bad translation, but i think you got it).
Dogs and cats eat grass when they are feeling their tummy.

edit: but i guess my comment is too late. She must feel better by now
This post was edited by goathik on Oct 26 2014 03:42am