Help!! We culled our entire backyard flock after discovering they had coryza and hatched some of our beloved's eggs. Our chicks are a few weeks old and today I notice one weezing and think I smelled that nasty familar smell. We used nothing from our other chickens, have not been to the old coop or even that part of the yard. I fugure that there ar two possiblities: The eggs had it on them and gave it to the chicks when thay hatched? OR Is it possible that our border collie who loved and herded our chickens and is very attentive to the chicks is a carrier? If someone has a clue please help we have more chicks to hatch and 20 new pullets aswell.