A week ago my 12 week old chicks became infected with coccidiosis, i lost half of my babys, but the remaining chicks seem to be getting better as the days go by. Here's my new problem. My older hens seem to be getting sick, even worst, i've treated them for coccidiosis as well. My one hen is doing pretty ruff. Her head is hung low, tail feathers down, she is very depressed, Iand she's not getting around much. I don't think that it's coccidiosis because they have been going through the treatment just as the chicks have, which treatment has almost been a week. They are kept completely seperate, and i have been really big on bio-secutity this week so i am confused on why she is so ill. My other hen is sorta sick as well. Not as bad. But i knew something was wrong when i opened my coop for them to roam, and they stayed up in the coop instead. It's been pretty cold here, so my initial thought was that they were chilled so i seperated them and put them in a shed with a heat lamp and heat, but they haven't peked up any. Please help!!!! I've already lost four chicks in an absalutely horrible way, I don't want to have to go threw this with my hens as well. Does any one have any suggestions on what could be going on.