I have a 4 mo NN that has been sneezing once in a while since june. it was raining when she started, after that we had a very hot and dry summer. she is perfectly well, gained weight (almost 7 lb) and no other chicken sneezing. any idea what it might be? I found some posts about fungus respiratory problems. but as she has been untreated and in 2 months she developed perfectly well I don't know if that is the case. what food/herbs are good for fungus?