I brought home some sick chickens that infected ours. One of them died in a matter of days, it's sinuses were so bad one eye was usually closed. The other one fought for 2 weeks but labored breathing the entire time and gaping for all the way until a few days before death. I treated them all with antibiotics Tylan, electrolytes, and a round of dewormer. I have a Welsummer chicken that was gurgling but seems fine now. The longhorn has started going downhill. 1) Longhorn 7 months, still feels normal weight 2) Gurgles, chicken has no energy and barely eats. 3) She's been gurgling for 2 weeks 4) The sick ones that brought the disease are now dead 5) No trauma 6) The crop I got it from were infected, the store manager did not find out what was wrong with them. 7) The bird has been eating normal chicken scratch, I've started added yogurt to encourage eating. 8) Yesterday she shot out a white/yellow poop, possibly egg? 9) Tylan, electrolytes, organic de wormer (ordered Rooster Booster on Amazon should arrive today) 10 ) I intended to treat the chicken myself 11) No wounds 12) The two remaining chickens sleep in an enclosed coop 3 feet off the ground. During the day, they stay in a chicken run 8''x4''. Now that it's getting into the 40s, I wonder if the chicken coop is a warmer place for them to stay in.