My RIR hen has been coughing occasionally for several weeks. She also wheezes or has raspiness to her breathing some nights, sometimes opening her beak to breathe. She seems fine otherwise. She is laying an egg every two days or three. She is eating a medicated antibiotic crumble in her food, but does not seem to be kicking the cough. I have her separated from the flock. None of them show symptoms though they were all together at one point before we pulled her aside. She has been with us for about 2 and a half months, having been bought from a feed store (after reading all the trauma on this list I won't do that again, I think). No mucous, runny eyes or nares, poops are okay, eats and drinks well, looked in beak and don't see anything stuck there....I'm not sure if she is contagious and if I should keep her separated. Anyone have suggestions? This is my first post. Glad to join this nice group of chicken-folk.