I recently got a new hen about a year old I only waited a week and a half to put her in with existing flock, she’s have loud rattling like breathing and sneezing, she acts normal and clear eyes and nostrils but the breathing is really loud. I gave her tylen 50 orally yesterday. I got two doses in her and I had this same respiratory issue with my old flock this past spring, I treated them with the Tylan 50 for 5 days and the bounced back fine. I mean identical symptoms. I’m worried of course and freaking out. Am I doing the right thing? Don’t want to lose her and hate to hear her breath. Really upsetting to me.