I read the sticky about culling chickens don't get colds.She sounds like she has a cold and has had it for at least 1.5m none of the others show any s/s that I can tell at this time.She sounds likke a child with a running nose occasional cough or sneeze or something I thought originally it was from drinking the water too fast and aspirating.She eats and runs around ok no problems.I have seperated her now and am worried about if I should cull or treat with antibiotic and return her to the flock