My wife called me at work to tell me one of our barred rocks is dying. She found her a few hours ago laying on her side with all the other chicks huddled around, I guess trying to keep her warm. She was very active and ate med. food and always has fresh water, with heat source. Brooder is plenty large enough. She is only half the size of the other chicks though. She was acting like the head hen before she found her. Not like she has been lathargic. She will not open her eyes but she is still breathing. I had her give a little bit of sugar water to see if it would help. Any suggestions. She is 5 weeks old and is our favorite one. Why does your fav always die?