I have a while leghorn (about 4 weeks old) that started acting lethargic a week ago. She was all puffed up, tail was down, and she was sleeping all the time. I pulled her out of the brooder and put her in the "hospital wing" brooder with 2 other chicks with runny noses. I put them all on antibiotics and apple cider vinegar. The two with the runny noses seem to be improving and growing normally. The leghorn is not. She is still about the same size as she was a week ago when I put her in the hospital brooder. Could it be that she is too hot and that is why she isn't growing? She doesn't appear to have gotten any new feathers either. Please help! I don't want to lose her, but I also don't want her getting anyone else sick. I have a russian orloff that is starting to show similar behavior...I am just hoping she was tired when I looked at her last. Thanks for any ideas/help!