Well, she went in for bloodwork on Tuesday & it came back normal, including a negative heartworm test!
I named her Parker, since she was found at Discovery Park & no one would go for the name Disco.
She got her first vaccines, a bath, Capstar, Comfortis & a deworming. She's already a lot less itchy & one of the "masses" seems to be drying up nicely, so might just be an old moist dermatitis or something. She eats & drinks like a horse. She's been okay with the cats, had no accidents so far, made minimal fuss about crating, and today she spent time in the same room with my two with no drama of any kind. Which is nice, because the x-pen dividing the front room is kind of annoying.
Parker's spay/mass removal/gingival cautery is scheduled for Monday. Shortly after that, she will be available for adoption.