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					Originally Posted by dianalee  Whatever it is, the breeder sold me a defective dog and should honor her guarantee and give me my money without taking away the dog.  My vet said the dog is sick and that's good enough for me.  Vets don't lie about these things.  The breeder is a no good bum as far as I'm concerned! | 
 
  hmmm....I don't know what else to say to you as it seems your mind is made up!  
Honestly, I would be concerned about the pup first and foremost, as he only has you to do what's best for him.  All we are saying is to gather as much info regarding whether he truly has a Shunt, MVD or something else or nothing. 
(1) BAT of 55 and a U/S performed by a general vet isn't enough proof for me to jump into an invasive surgery.   
Roxy's first BAT of 100.9 was in definite Shunt territory, but I first got a second opinion from a Board Cert. Specialist, then we did further blood tests, etc.   Then we did a U/S (which I wish I didn't b/c it was a waste of money not being 100% accurate) there are other things to spend $ on that would give better results. 
I know that you say Vets don't lie, and hopefully that's true all the time, but they aren't perfect with diagnosis being dead on.  If you do a search here for Liver Shunts or MVD - you can read all about the 2 conditions, and how people recommend from their experiences how they are diagnosed. 
I wish you nothing but the best.  Please keep us posted.