We have a black australorp hen, no idea on her age. She first started showing these symptoms, coughing , sneezing, bubbly eye and blocked nare last November . Since then she's been treated with tylan50, duramycin, doxycycline and vet rx. She will get better while taking the antibiotics, then the symptoms return shortly after she's done with the meds. She still eats and drinks fine and is still laying. I was convinced she had MG, and we added denegard to their water monthly. Now I'm not so sure. It's always the right eye and nare, never the left. I wonder if she has debris in her nare that we are not getting out. Could something like that cause all her troubles ? And if so, how do we remove it safely? Thank in advance!