Unfortunately, it sounds like she's dying already and suffering as well.
I'm sorry, I'd recommend you put her down.
It's odd that you're having this problem repeatedly, are these production breeds? What's their diet?
I wouldn't worry about the house, chicken mite aren't interested in non bird hosts. clean your coop out completely, burn or throw away the bedding, treat the coop and the birds, get all new bedding and litter