Have you treated them yet? I would try sectioning them off and medicate them! I love my girls and hopefully she only has a little cold and will be better the end of the week. The lady at the feed store was like, just wait, give them the medication, they get colds like us. If the meds do not work, i will take them to the Vet that has a specialist, it is about an hour away from me. I just did a lot of research and calls to people in the area, maybe do the same for your girls before culling her!!