Hello from New Zealand everyone, I wondered if you could help me solve a puzzle. I have a 1 year old hyline chicken who developed a respiratory issue about 10 weeks ago. Her symptoms are sneezing, and a slightly "runny nose" laboured breathing which fluctuates between a slight wheeze to gasping loudly to making a horrible sound in her throat that I'm not sure how to describe. Other than that she is eating and drinking normally, has normal poo's, has a bright comb, and bright clear eyes, is laying normal eggs every 2-3 days and she is energetic enough and interested in her surrounds, and seems to be happy in herself, except when the respiratory issues are at their worst. (She closes her eyes and tilts her head up and sits gasping when she's really bad). Due to the breathing issues, I immediately isolated her, and took her to the vet. (none of my other chooks are showing any symptoms) They treated her for possible viral or bacterial issues, with antibiotics and anti inflams. She did a full course, with no improvement. I did some research online and thought maybe her symptoms were caused through gape worm, so I talked to the vet and we agreed to treat her with eprinex. In the meantime I had caged her inside due to cold weather, and she seemed to be making some improvement. However this did not last and so I talked to the vet yet again, and he suggested a stronger wormer. I had her on one, given orally for 7 days, which is designed to treat a wider range of worms than eprinex. Improvement was minimal if at all, and when she was placed outside in the cooler weather (in her "isolation pen") she would get worse again, so I deduced the cold weather is making whatever she has, worse. Next I decided that maybe she suffered from asthma, brought on by cold weather, so I borrowed an inhaler from an asthmatic friend (figured it would not hurt at this stage to try it) and when she had a bad attack I puffed her airspace with it. After about 10 minutes she seemed to be a little better but still wheezing, so am still unsure as to whether she has asthma or not. I have read everything I can on respiratory diseases in chickens and her symptoms just don't match anything I can find. The fact that this has gone on for over 10 weeks is a mystery in itself. She has not gotten better or worse in all this time, though has moments where the breathing is better and worse but seems to fluctuate all the time between the two. Has anyone had anything similar happen in their flock? Any suggestions I could try? I am reluctant to have her euthanized if there's any chance of her recovering as essentially she appears healthy aside the breathing difficulties and she does not appear to be unhappy or suffering. Thanks in advance for your advice.