[HedgeMom]

It could be a bladder infection or it could be a uterine issue.

There are varying opinions as to whether the first step should be a sterile bladder tap. Some advocate for trying a round of antibiotics to eliminate the possibility of a bladder infection before trying an invasive procedure. My experience has been that there is rarely a bladder infection. Pretty much every female with bloody urine in my house has had to be spayed.