Looks like there was one about Marley
on page one of this thread back when you joined? Just trying to get a picture of any changes that might have been made since your first post...
A UTI wouldn't necessarily have shown in blood work, so it might be a good idea to have the vet run a urinalysis tomorrow before she's sedated for her dental cleaning. Often, a sudden change in peeing behavior can signal a physical problem, like a bladder infection.
Hope all goes well tomorrow! Do we get pics of them all with their shining white newly-cleaned smiles tomorrow?