Thank you SO much, Connie and Ann!
We were at the specialist today and he's doing the bile acids test but didn't feel strongly that it was a shunt, unless it's MVD. Which wouldn't be operable. When he calls back with results tomorrow I will ask about Addison's.
They did suspect kidney at first, but an ultrasound did not support that.
Poor little girl! She had to be force fed today for the test and is so uncomfortable now.