I'm really confused why some of you would recommend a Blood Panel over a Bile Acid Test

Both involve a blood draw...one is not any riskier than the other, and honestly, the risk of complications from a blood draw is very low. A blood draw is a common, routine procedure and the amount of blood they need for a blood panel or BAT is small.
Someone said if the breeder doesn't think he has a shunt don't test...please don't only trust your breeder. I know first hand that breeders will lie about having liver shunt problems in the past. If you and your vet think liver shunt is a posibility from the symptoms he is exhibiting, get that baby tested. The sooner he is tested, the sooner he can be treated if it is a shunt. Otherwise he will only get sicker.
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~Magnifique Yorkies~
Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs.
Educate yourself and buy from reputable breeders or rescue.