Demodex test taking a while? I'm confused... did they do a punch biopsy? Usually, a skin scrape takes as long as the vet requires to walk from the room to his microscope and take a gander.
I have a foster female with demodex. Oral ivermectin every evening and it resolved in a few weeks. She'll need to stay on it for a few months, then we'll take her off daily and see what happens.