We brought home 12 one and a half week old chicks from our local farm store yesterday. They were all fine and active yesterday and up til this morning. I noticed one of the Buff Orpingtons was acting very sleepy and not very active. She is quickly going down hill at this point. Not eating or drinking, hiding in a corner away for the rest who were all playing and chasing after flies. She's sleeping standing up, not even bothering to open her eyes anymore. What could be the problem? None of the others are showing any of the same symptoms at this point. We are continuing to feed them the same medicated feed that they have been eating. Plenty of fresh water. Temp in the brooder is about 90. This is our first time with chickens, so I'm a newbie!