I have some infection that is spreading rapidly throughout my flock of laying hens and roosters. The are coughing, sneezing, listless, some have nasal discharge and some have their eyes closed. They do not have swelling of the face however. They seem to be eating less and egg production has decreased by half. Since it is a mixed flock I am unsure of the color of the droppings of the birds infected, however I have noted some fecal matter that is green in color and firm still and others that are a yellow/brown color with a very loose consistency, ie diarrhea. Those are all the symptoms that I can think of right now. I have consulted my chicken health handbook and have a few ideas, however each disease I find states symptoms that mine do not have so it is keeping me guessing. I also tried to call the extension office but no one will be in until Monday so I am a little desperate. I appreciate all the help in advance.