Had a guy put a turkin hen in my coop while I was not at home. Noticed it wheezing the next day, should have taken it away then but I never. Monday, I had a dozen chickens wheezing ,coughing, Hiccups, chirping and yellow runny poop. I have lost two thirds of my chickens in the last 2 days. The healthy ones I have seperated. I believe they have respiratory fungus,all the symptoms match perfectly. I also have one less so-called friend now also!