For sure. There's nothing easy about facing such a possibility, and having so few options. And yes, lessons for next time, but thats different from the feelings going on now... I wish some people could come forward and take them. I can't, I just moved to a ground floor apartment and smuggled in one hen. Or I would love the challenge. I think people get a bit scared. Im just so sorry... I wonder if these mites are resistant to the usual? Maybe then that indicates something, anything that could help? (I'm sorry, I don't mean to be a thorn while you're going through this. I just keep trying to find solutions...) could SPCA or humane society help?
Not too sure what you have been told, and I'm sorry again, but an updated list of treatments is here:
https://poultrydvm.com/condition/mites