Can anyone tell me what makes chickens huddle together to the point that they hurt/kill each other by suffocation? I have one brooder box that I am having problems with the chickens in, they all want to huddle together in the corner. I had them in a cattle trough as a brooder box and I thought that maybe it was getting to hot in there for them, so I took them outside and put them in a place outside where they could get air and run around. All of them did fine, they were all fine up to the point where I put them back in the chicken house that night and then when I checked on them a couple of hrs. later two of them were deadk, and they were all huddled together. I know they are not cold they are a couple of weeks old and it is 85 degrees here. I also have five brooder boxes running and the chickens in the other brooder boxes are fine and do not huddle together at all they are all running around and active. It is just this one bunch of chickens. Is this how coccidiosis acts could it be that? They all act healthy though when you get them away from huddling together they all eat good and are active they were eating grass and bugs today. Any help with this is greatly appreciated.