So back in february, one of my girls passed away after fighting an infection for a few months. In may, another one passed away suddenly from a stroke. For a little over a month, my last girl ophelia has been alone while i have been looking fof either a new home for her or an older buddy to adopt. I have found someone looking to rehome a bunch of older females, but recently my girl has been scratching and cleaning much more than often and last night i noticed she had little open sores (presumably from scratching herself) all along her shoulder area. Though this is most likely some kind of parasite, i remember reading something about how anxious or depressed rats clean themselves much more, and i have also been going heavier on the treats since she has been alone. Is it safe to assume its mites and get treatment before i introduce her to other rats or is it more likely caused by something else? Additionally, how do i introduce rats if there is a risk of mites?