The brochure I posted above has a section on MVD which is what Capone most likely has.
You can find a specialist at
www.acvim.org Most of them will do a lot of testing. That is just the way of internal med vets. I personally would probably not do a biopsy .. there really isn't a "treatment" for MVD. Some people think these pups should be on low protein food and some don't. My Teddy Bear had a shunt repaired and now has MVD .. he was on a regular diet until we found out he also has IBD. Many of the liver pups have IBD. He is on Hill's Ultra ZD and doing well.
There is an interesting quote from Dr. Tobias in that brochure :
"Don’t bother to ask whether lactulose, diet, yogurt, SAM-e, milk thistle, antibiotics, or anything else will be helpful to your ‘asymptomatic’ dog; the fact is, nobody knows! All we can tell you is that many of our “normal” Yorkie patients have mildly increased bile acids and live long lives without any special treatment, as long as they don’t get sick from something else."
—Tobias