A urine bile acid test is not accurate nor is the IDEXX SNAP Bile Acid Test. The only accurate test is a pre and post prandial Bile Acid Test. This should be the first test done and if it proves positive then an Ultrasound, Portogram or Scintigraphy should be done to determine where the shunt is and how severe it is. The technician that performs an Ultrasound should be well versed in reading the results as some inexperienced technicians are not competent enough to see the shunt, especially if it's hidden behind other soft tissue. There are links on my web site
http://yorkies.com for information on Liver Shunt. You can also join a Yahoo group that I help moderate that deals with Liver Shunt & MVD. To join send a blank email to:
Liver_Shunt_And_MVD_Support-subscribe@yahoogroups.com
Or go to:
http://groups.yahoo.com/group/Liver_...d_MVD_Support/