Hey everyone! Our Australorp, Bella, got a slight cough about a day or two ago and I was completely shocked to find her dead in the coop this morning! All of our birds are pretty healthy and happy, aside from the dusting we had to give them earlier last month due to some bird lice. Is there a known disease that acts this quickly? She had a cough, seemed very lethargic and tired and this illness swept through her fast! I want to make sure my other hens are protected! I use conditioner and vitamins in their water, they had been dewormed around August and I keep their coop pretty tidy! Any insight would be greatly appreciated! Thank you!