Just also wanted to say "Thank You" to everyone for your kind words, suggestions, and support. Audrey is dealing with alot of issues and having people to vent to, who really seem to care about Audrey really makes things a little bit easier to bear.
On a positive (?) note, turns out Audrey DOESN'T have the contagious type of mange (sarcoptic). I found a flea on my other dog, Copernicus, and it turns out THAT is why they have both been so miserable.

I am pretty upset because Copernicus is on frontline, but it looks like it's not working. I have heard reports in my area that FL+ just doesn't seem to be doing the trick anymore. I am going to the vet tomorrow to pick up some Comfortis for them both. We by no means have an infestation going on (thank god!) so hoping this at least makes them both stop scratching!
Audrey is seeming to tolerate her ivermectin and Cephalexin ok. As I mentioned above, still no recent poops so I don't know how that is going, but she hasn't vomitted or had any reaction to the meds.