she may have a history of this, my friend is currently going through something similar. started with urinary stones and the type of stones indicated it could have something to do with liver. biopsy acid bile test and cat scan later, it turned out to be a liver shunt and he just had surgery for it.
Have you had an acid bile test done and do you know if the stones were.
The 3 Breeds Most Vulnerable to Having Uric Acid Bladder Stones