I have a golden sexlink pullet who has been sick for about a week now. She is about 20 weeks old. A week ago we were told she was a cockerel, so we gave her to a farm in the area. A few days later we realized our mistake and brought her back home. She only spent a couple hours with my flock before I noticed some bloody mucus coming out of her nostrils. She has been in a dog crate in the garage ever since. None of the other chickens have shown any symptoms thankfully. I gave her some Tetramycin in her water the second day. I use a syringe every night to make sure she is getting some of the medication. It has been over 5 days on the medication now with no improvement. Her symptoms have not gotten any worse though. Her eyes are still clear, and she is eating well. A few days ago I noticed her poop was bright green. I read up on the forum here and found several people explaining that this was a sign of excess bile in her system. I gave her a couple soaks in a warm epsom salt bath (which she seemed to enjoy very much.) The green poop disappeared. That problem seems to have been solved. But I am still worried about her respiratory problems. She has mucus on her beak from her nostrils, and her lungs sound a bit bubbly. She coughs and sneezes several times a day. I am wondering, are there any other treatments I can try? Has anyone else had similar problems?