Hi there, I have 4 different pens this year, grow outs and what not. And my flock of 3-5 month olds, assorted breeds, are giving me trouble. Lots of sneezing, no discharge, no wheezing, just lots of sneezing. And a lovely bout with Cocci. I am treating with sulmet, and started them on terrimicin (sp) it was all I had on hand, and figured it was better then nothing, in case they in fact have a respiratory illness, but I am uncomfortable treating something that is technically unknown. Are there other symptoms to watch for besides the discharge/wheezing, or could they be terribly sick, and only have the 1 symptom? This is awful for any chicken owner, but this pen, is my big money pen, and I have really fallen in love and invested so much in them! I am open to any advice, and I am so grateful for any help. Thank you!