I was just going through old threads and thought I'd bump this up to see if anyone has come upon the right answer yet.
For the record, Ellie was masked down last time.
It is supposed to be better for her liver (I think Dr. Tobias agrees).
I'm just not sure why there is a debate and I wish there was one good answer.
The decision on Ellie will be left up to her vet but this makes things very confusing. Some specialists say mask down and some say don't and it isn't a little issue either.