Have you checked the insides of her legs, sometimes if they have a respiratory infection the insides of legs get matted looking form cleaning off the white snot. I'm not sure what to do since you've got other rabbits. I don't have that many rabbits and have treated respiratory infections with Zithromax/Azithromycin. They cleared up but I suspect it was not Pasteurella that my rabbits had- it may have been another easier to treat pathogen like Staph.