Hi XXXXXXXXXXXXX~
Although it's not unusual to see a small amount of blood if a dog has been vomiting for a long time, what you're describing is absolutely NOT normal.
It sounds to me as if she may have a tear in her digestive tract somewhere...possibly from the bone she ate. Whatever the cause, this requires a vet's attention immediately.
If this were my dog, I'd get her to a vet right away. They'll likely want to take an x-ray to see if there's something unusual going on and will probably want to observe her to see if they can figure out where the bleeding is coming from.
I hope she's okay.
Certified Veterinary Technician
Associates Degree in Veterinary Technology. State and Nationally certified.