My comment wasn't just directed at you, perolane. I just think you cannot say for certain, yup, your bird has mycoplasmosis/CRD or infectious bronchitis or this or that, if there are overlapping symptoms for several diseases. I always get strung up for saying cull for this stuff, but if you look...
I know Doc Brown. What he will do is tell you how to treat anything-in other words, he'll do what you ask him to do. He will not necessarily tell you to cull for anything. The problem is that most things are highly contagious and make carriers of the survivors and that is why breeders who sell...
Could be CRD, Chronic Respiratory Disease or Coryza, but no way to tell without testing. My only treatment would be to cull since, if she recovers, she will probably remain a carrier. I won't ever tell anyone to treat with antibiotics, especially since we dont know if it's viral or bacterial...