I stated previously that it was vaginal bleeding.
They did an ultrasound and everything looked good. They did a physical exam and couldn't feel anything either. They think it's a UTI. We have some antibiotics and we'll get the culture results tomorrow.
If you all remember, we thought she had one prior to her spay (an UTI) so the doc said that this could be the result of supressing her immune system with the spay, etc..
ANND, Bella did really well with the new people.