There's no discharge, eyes are clear. There are different zones in the brooder and good ventilation as well. It's been the same for 1 1/2 weeks since we got her while the others continue to be fine.
we are diligent about keeping it within the recommended temperature and she's the only one of the 4 with the issue and it continues to be an issues. The place where we bought the chicks said to give it Corid.
I bought 4 new chicks from a reputable breeder, received them 4 days ago. The Barred Plymouth Rock (which was supposed to be a Dominique) was a week or 2 older than the others (they were one week old). They've been vaccinated for Merck. The Barred Rock has had rapid breathing the whole time...