Prayers are coming your way. LS and MVD are not a death sentence, he can live a normal happy life, it's good to get to the bottom of this though, so you know what path to go on.
I agree with everyone, 125 may or may not be LS - Please don't waste your money on an ultrasound, as others have stated it's not 100% accurate, and then you will be forced to spend more money on other tests (which you could have skipped to in the first place).
Roxy's first BAT was 43 (pre) and 100.9 (post) - we did a full CBC, urinalysis, coagulation and a U/S - everything came back normal. Roxy doesn't have any of the more obvious symptoms, but she does have something wrong with her liver. I have opted to maintain her with diet and supplements (for now, as the next step would be a biopsy, and I don't want to put her through that). Both my general Vet and her Internal Medicine Specialist feel (based on what we have done so far) that she has MVD
