more info on stones and liver - so you need to know if urate bladder stones or struvite which they will test the stones once removed- if urate then tied to liver
Portosystemic shunt - Wikipedia, the free encyclopedia
Symptoms and diagnosis
Symptoms of congenital PSS usually appear by six months of age[1] and include failure to gain weight, vomiting, and signs of hepatic encephalopathy (a condition where toxins normally removed by the liver accumulate in the blood and impair the function of brain cells) such as seizures, depression, tremors, drooling, and head pressing. Urate bladder stones may form because of increased amounts of uric acid in circulation and excreted by the kidneys. Initial diagnosis of PSS is through laboratory bloodwork showing either elevated serum bile acids after eating or elevation of fasting blood ammonia levels, which has been shown to have a higher sensitivity and specificity than the bile acids test.[4] Rectal portal scintigraphy using 99mtechnetium pertechnetate, a technique of imaging involving detection of gamma rays emitted by radionuclides absorbed through the rectum and into the bloodstream, demonstrates the blood vessel bypassing the liver. Surgery definitively shows the shunt if it is extrahepatic.
these are the two types
Types of bladder stones in dogs - URATE and STRUVITE
There are several different types of bladder stones in dogs, depending on their chemical make-up. Struvite stones are composed of magnesium ammonium phosphate. Others are made of calcium oxalate, calcium phosphate, cystine, ammonium urate, or other chemical compounds. Some stones can actually be a combination of these. Each type of stone has its own different peculiarities as to which breed is most often affected and what factors affect the formation.
also if bile acid is high over 100 when they do surgery for stones you can have them see if there is a shunt