Thanks for the concern and good wishes guys. Sorry for so few updates; it has been a rough last couple of days. I never understood how people valued their pets as much as they do until we got one of our own. She has never really even been sick so this was kind of nerve-racking.
That poison is nasty stuff. I wasn't really sure if she was going to pull through. She was throwing absolutely everything up, and there was lots of blood in it. She didn't throw any more blood up after yesterday afternoon, which made me feel a bit better, and thankfully she was back to her old happy self this morning. I think all the blood was just from the trauma of everything else - she probably tore things up in there, but it must be on the mend. She can finally keep food (and the vitamin K antidote) down, and this morning she had her first full meal since early Wednesday. The vet said it takes up to a month to get all of that stuff out of her system with the antidote, but she seems just fine now and it is certainly a relief.