Anyyone have experience with a collapsed lung? I've got a pal with a 3 year old female, diagnosed 3 days ago with anemia, treated with prednesone and docycline, then returned to the vet at my insistence to discover a collapsed lung.  No ready explanation for the anemia (not the autoimmune kind) but they think all of this is from ingesting rat poison. Lulu lives in a neighborhood with a fenced bac…