My big cochin was fine a few hours ago She was happily sunning herself and scratching and pecking around. Even aid an egg and made a dramatic announcement about it. I went hiking for 2 hours. When I came home, she was standing in the middle of the yard making a moaning/wheezing/squeaky-toy sound with every breath and sometimes sneezing. She has some light blood on her cape from her wattle. Her comb and wattle look very red and kind of "sweaty" - almost like she pressurized herself so much that she's making herself bleed from the tissues. I can't see anything obstructing anything. If it's respiratory infection, it sure did hit fast. I only have Sulmet on hand. There is no discharge (no snot). I put new wheat straw in their coop yesterday. There's a lot of seed in it. This hen has been very enthusiastic about scratching in it, kicking up a lot of dust. It's not moldy. I also put DE in with the straw when I replace their bedding. I suspect she's inhaled both straw dust and DE. Could thatr be the cause, and what can I do about it? She's inside with food and water right now.