About a week ago one hen began to cough or sneeze and occassionally have a runny nose, looks a little under the weather but seems to be eating, drinking, and free ranging fine. Today seems a few more are starting to cough, could it be a cold or pneumonia? It has been getting cooler here and I have been feeding them some dusty scratch grain. Thier coop also got pretty dirty before I resently cleaned it. I had a drastic drop in egg production a few weeks ago but figured it was that time of year for molting and less light. I put some electrolites in the water tonight and probably will look into meds tomorrow. Any ideas??????? I've had chickens for awhile but thankfully no problems like this so far......