Hi, my black sex link that is approx 20 weeks old has developed a cough. It sounds really strange. Like a dry cough. She doesn't appear sick in any other way. She is eating and drinking and moving about just fine. My husband noticed it yesterday. Should I remove her fromt he others? We bought an older bird 18 months, and she started this when we got her but it went away. (I thought it was just her noise, I had no clue!) Any suggestions would be great!!!!