I’ve got a two year old buff Orpington who is going through a hard molt. A week ago I noticed her high stepping and crossing feet when she tried to walk. She also had a little crackle with each breathe. I brought her inside and treated with antibiotics, the crackle went away but she still high steps and walks awkwardly. The whole flock was dewormed and given ivermectin recently and I don’t see signs of scaly leg mites or anything like that. Any ideas?