dlhunicorn, do you think it would help for her to try giving some additional vitamins for a few days, at this point? Just in case the feed is older or the heat has dissipated some of it's nutrition and the bird has been under so much physical stress? Something like one of the good and complete poultry supplements? I'm concerned that it's been 2 weeks without more improvement.
I guess I'm thinking of the stories of silkies that have had neck problems that seemed to improve with improved nutrition and wondering if this bird might be having nutritional problems as a complication to the original issues. It's just a thought.
MissBell, have you followed up with your vet recently, to let your vet know how your girl is doing? What antibiotic has she been on?