I have read many books about chicken diseases and pests. I did quarantine the new hens originally, a whole separate coop and run.
My two girls have absolutely no runny nose, eye drainage, sneeze or cough, rattles in the chest, and diarrhea. They are healthy, active, bright red combs, eating...
They are 31 weeks old, a Wyandotte and a Brahma, the first started laying at 19 weeks and did daily until 3 weeks ago when we added 2 new chickens (which are both under her in the pecking order), the second (head of flock) started laying around 23 weeks and stopped 10 days ago, after acting...