Hi John, first off I would like to welcome you to YT. I am glad that you found this group. Even though we can't cure your little Sophie directly, we can certainly help with all of the prayers, being said in your family's behalf.
Unless you have complete confidence in your vet, I would suggest getting a second opinion. I always question vets who start with the "big $$ diagnosis items". There are many things that can cause slightly elevated bile acid test results, including eating a high protein diet. I am surprised that the vet didn't first recommend changing diet and doing a full blood panel - which is much more valuable than just a bile acid.
After re-reading your original post, it seems rather odd to me that the neurologist offered a 1,600 - 3,200 diagnosis and when you said that you were not in a financial position to pay that amount of $$, then all of a sudden he recommended the bile acid testing. I would really consider looking for a new team of vets. Even though the group you are using might be talented, it also sounds like they are trying take as much of your $$ as possible.
My prayers are with Sophie, you and your wife. |