Anyone have any thoughts on what could be causing breathing difficulties in an otherwise healthy 3 year old sussex bantam hen? She was normal until yesterday when I noticed her breathing was noisy and labored. Yesterday it seemed like putting her head down to eat was uncomfortable so she didn't eat any of the mealworm treats which she would usually fight for. I don't think she ate much all day as her crop was small at night. Today her breathing is more labored, even a bit squeaky/noisy. I'm sure she hasn't eaten. Noticed her standing to roost instead of sitting on her perch. Gave her a few steam treatments but they don't seem to have any affect. No discharge from her nostrils or mouth. What could be causing this and what should I do? Hate to see her suffering.