We have only 2 girls, 4 months old, and one of them is sick, for 2 days been standing around all puffed up with her head sunk into her puffed neck feathers, tail down. She let me pick her up which is really unusual, she didn't seem to have mites and her crop was empty. First of all they are not roosting yet, they have an indoor place with a roosting branch but they have resisted going in there, even though we've shown it to them several times. They huddle in a corner of the run that is quite exposed to the elements even if it's raining, and it's been getting chilly (low 50s) should they have a heat lamp? Anyway this is beside the point (I'm just wondering how the barred rock became sick) but mainly what could it be and what to do next. I've read a lot of posts on this forum and some mention these symptoms with cocci but I don't see any bloody stool. She eats a and drinks a little but not much. Here's a pic. Thanks!