One of our healthy looking sweet little Blue Andalusian chicks dropped dead this afternoon for no apparent reason. We checked on the chicks (there are 15 total, various breeds), left the room, went back in a short while later, and there she was, dead on the floor of the brooder with the other chicks stepping around her, apparently unfazed by the little dead chick. No previous problem, none of the others looking "off" at all. She just hatched four days ago and has been perky and active the whole time. My boys were very upset and had to have a chick funeral, but I'm just baffled. Now I'm worried about all the others. They are all in an inside brooder, never been outside, none of them pecking at the others or anything. No contact with outside chickens. So sad.