Looking for advise please please excuse any spelling dyslexia sucks. ok so I have a chicken who constantly sneezes and shakes head. this is not a short term thing it's been gradually getting worse over the years and now its sneezing all day literally every few seconds. she has been to the vet who says her lungs sound clear and as she is eating drinking and doing all other normal chook stuff is fine. could it be an age thing she is about 6 years now it makes me feel rotten listening to it all day and I wonder if I'm making her suffer. there is no dust in her house all other chooks are fine and have never had anything similar. they have all been wormed and the vet even gave her a course of antibiotics but no change. he did say she mouth breaths is it possible her nostrils have an issue they are clear and no discharge tho. has anyone had this issue that is just age related I just dont know what else to do. I dont want to end it for her if there's no need. thanks for reading.