Okay, she should not be vomiting just because she is eating the dog food, unless she has a sensitive stomach to it. My guys dip into the dog food also and have never been sick from it.

I would definitely consider taking her to the vet for a check up. There is obviously something quite not right for her to still be vomiting.

In regards to her eating the dog food. If you can, put her in a closed room while the dogs are eating or at least supervise to make sure she doesn't get into the food and then when the dogs are finished, put there food away somewhere, where she can't get into it.

How is she doing tonight? Has she vomited any more since this morning?