Liver shunt or portosystemic shunt is a congenital malformation of the liver that causes blood to bypass the liver while traveling fromthe GI tract to general circulation. One of the liver’s many functions is to maintain the body’s blood sugar level. Because blood is not circulating through the liver properly, hypoglycemia or low blood sugar may follow. This condition can sometimes be cured with surgery. A liver function blood test such as bile acid testing is needed to diagnosis this condition.
www.veterinarypartner.com, “Toy Breed Hypoglycemia”