I have two month old Orpington chicks at home, when I went in to go take care of them I found one laying down with both its feet in front of it. I believe it has lost feeling in one of its feet and the other seems very stiff. I couldn't feel any fractures, breaks, or misplaced tissues in the legs and there doesn't seem to be any swelling. We put her in a sling in a separate cage last night but I am worried for my other chicks, if its a sickness of some sort how should I treat for it? And can I help the injured chick at the moment?