My 7 week old light brahma chick died last night. I do not know what happened. When I let the girls out this morning they went right out but I only counted 5. I checked the coop and didn't see the remaining chick. I counted again and still only 5. I went in the coop and she was under the nest boxes on her back. She had not been pecked and was not missing any feathers. I just don't know what happened. The only thing I can think of is maybe she got chilled. They were moved to their coop last week and have been doing well out there. My question is would they still need a heat lamp at night? They haven't had one in at least 2 weeks (since it has been so hot). The temperature went down to 59 last night but their coop is solidly constructed with no drafts. I feel terrible that I might have been able to prevent this. She was such a pretty girl with all of her white feathers! Are there any other things I should look at to prevent this from happening again or is this probably due to the temps last night? I am just kicking myself right now!