I have a 9 month old hen (amongst 2 oldies and 2 sisters) and she seems to have a sore throat. They are all at present confined to their run because of H5N8 virus which apparently is spreading from Europe (we live in the U.K.) The other hens are fine (at the moment!) Dusty has just started laying and we are experiencing quite a cold winter, she has only got this raspy noise/throat today. Is there anything I can do, will it go away, or is it the beginning of something really serious? I am very worried and reasonably new to chicken keeping. Any help or advice you could give would be greatly appreciated. Thank you.