I think that is called an open pyo. That is good because it lets it drain, otherwise it can go bad fast. I really hope everything works out for you and you dog. Keep us posted.
Sounds like you are on the right track with her. Hope all goes well, let us know.they said the dog should be able to have surgery tomorrow.. vet said her condition isnt THAT serious because theres drainage (i can smell it), and she's on anti-biotics to slow it down until surgery