[Ellie May]

I'm not sure that there is a right or wrong answer. I did elect to have my girl biopsied during spay, because it was a good chance to do it. There IS more risk to a spay this way. It IS more expensive. Some vets and internists will tell you it isn't necessary.

After consulting with your vet (not the staff), you should do what you and they think is best. It is generally assumed that Yorkies with bile acids in range indicate MVD. That might be okay. However, it isn't always true. There is at least one disease (rare but possible in dogs) that can raise the bile acids, but it has a different treatment plan than MVD to a certain extent (hepatic lipidosis).

Personally, with an asymptomatic dog, I wouldn't be too excited to be cutting into a liver. The other side to that is the fact that they will already be right there. I think this is only something your vet (or a specialist) can advise you on.

If there is a staff member there only until a certain time, then your pup will be left alone for part of the night. Because of the anesthesia wearing off, new pain meds being used, risk of the incision opening, possible breakthrough pain that needs to be managed, and problems related to dogs being unattended when an IV is placed, I would not leave her overnight.