I have a 1-2 year old hen (no particular breed but of "normal" size) that has been wheezing for months. Not laying eggs but then again most of the clock is not L She has an appetite. She walks fine and hangs with the flock. I checked her throat for worms during the summer but saw nothing. I dusted her and checked for bugs. I have recently looked down her throat again but nothing unusual. She continues to just wheeze or breathe loudly . . . like she’s a smoker. Every once in a while she will “sneeze”. Is this a respiratory issue with no other systems?