I bought 7 chicks last weekend. Honestly I should not have gotten them. One looked odd, sort of has his eyes half closed and ruffled feathers. She had just brough them out of the brooder house and the morning was a little chilly, and she said they were just chilled from the morning air. These are not day old chicks...they are probably a month or so old. Anyway the next day I heard sneezing. And then I saw the bloody stool. I treated them with Corid and the bloody stool has stopped, but they still look ruffled, eyes half closed, no nasal discharge but some sneezing. They eat and drink fine. I lost one of them and a couple of them look perfectly healthy....but the rest just look sickly. Any suggestions what I can treat them with now? Thanks.