I have a 11 month old d'Anver pullet that sounds congested, fluid in the lungs? We have had an outbreak of respiratory infections in our chickens, but they have been put under control, except in roosters with mites. Those have mostly died suddenly and we seemed to have gotten mites under control. I checked her for mites thoroughly, and she had none. No feather problems except picking on her head, she was in a cage with a rooster and two other hens. The symptoms of the previous disease were mucus in mouth and sinuses and sometimes foamy or mucus filled eyes. She has no mucus in eyes or mouth or sinuses. The only signs of sickness are the congested breathing and a weak stance as well as overall paleness. There is a drop in production of eggs from the cage and she has laid eggs before. Not certain if she is laying or not. Poop seems normal. The rooster with her seems weak as well, unfortunately he was too fast to catch. Keep or cull? The newest introduction to our flock were eight 9 week old Anconas, seven pullets and one cockerel. Added this Wednesday, I believe. They have no signs of sickness. Culling is an option for her and the rooster since many more are coming from the eggs from these cages. I don't want our whole flock to get sick again so one pair is a small sacrifice. She is in a cage in the house right now, by herself.