I am new to this site and to chickens both. I have 16 cornish roasters that are 6 weeks old. I noticed that one of them was making a noise yesterday and again today that I'm not sure what it is. I'm concerned that it may be coughing. I didn't notice anything else as far as runny eyes or nose. It was eating and drinking. How do I know for sure and should I separate it from the other chicks?