We bought five, 8 week old chicks, two weeks ago. I was told they'd be OK in the coop (enclosed) with a heat lamp and nice bedding (in Michigan, it's cold here) but one died over night so I moved them in the barn in my insulated tack room and they've been there for two weeks. The past two days and nights they've had no heat lamp (working towards weaning them to the coop with a lamp) Everyone has been doing well. One Barnevelder this AM is huddled alone and staggering when I stand her up. She's clearly dieing but I have no idea why! She does have some mess on her butt/feathers and has on and off for a week (nothing super nasty but seems to require cleaning where as the others do not) she feels like she's a lot thinner than any other time I've held her. I'm unsure if she ate yesterday as I didn't spend much time with them. Any ideas? I've stuck her in a box with the heat lamp in case she's cold. I wondered about coccidia- I have DiMethox 12.5% but have no idea if that could be this cause, have never used it, and am unsure how much I'd need to syringe into a chick not drinking. I have never lost chicks before! But then, I've never bought them in the winter either. Ideas? So, not eating/drinking, alone, staggers, weak, a little messy ?