I have a 9 month Gold Sex Link hen who is presenting a clear discharge from her nares. Sometimes, when she breathes, the discharge forms a little bubble and then breaks. Her only other symptom is that when she drops her head to eat or drink, you can hear a little rattled breathing. She is normal in every other way. She even laid two eggs a day on day 2. I noticed her when she did not come down from the roost with the other birds. I picked her up and saw the discharge. I brought her inside immediately in an isolation cage and put her next to a heater. I gave her yogurt, eggs, everything and she is eating as normal. For one day I put vitamins in her water. For day two and three I put Duramycin-10 in her water. It is now Day 4. She is getting better, she is obviously sick of being in her cage and is very chatty and animated, but her discharge remains. I know "chickens don't get colds", but with the lack of any other symptoms like paralysis, drooping, mucous in the eyes, I don't know what she has. I am very concerned about biosecurity and am considering culling her "just because". None of my other birds are symptomatic, all are completely normal. I introduced a rooster awhile ago, he never presented any symptoms and still hasn't. None of the other hens show symptoms. 1) What type of bird , age and weight. - GSL, 9 mth, good weight, not skinny 2) What is the behavior, exactly. - Behavior is normal, watery discharge from the nose 3) Is there any bleeding, injury, broken bones or other sign of trauma. No 4) What happened, if anything that you know of, that may have caused the situation. - Nothing, weather has been erratic, but she's been perfect the whole time I have had her. 5) What has the bird been eating and drinking, if at all. Eating and drinking fine. 6) How does the poop look? Normal? Bloody? Runny? etc. Poop is normal, non smelly. 7) What has been the treatment you have administered so far? Duramycin-10 for 2 days and am continuing. 8 ) What is your intent as far as treatment? For example, do you want to treat completely yourself, or do you need help in stabilizing the bird til you can get to a vet? I would like for her to improve enough to return to the flock, but I worry she'll always be a carrier, of what I don't know. 9) If you have a picture of the wound or condition, please post it. It may help. Picture below. 10) Describe the housing/bedding in use - Bedding in the coop is wood pellets and pine shavings. Chickens are let out to free range during the day.