He was not under the heat lamp, he was on the same side as the last one who died. They are 4 weeks this coming Monday. They all seem fine. They scratch around in the brooder, they all eat and drink, I have Save-A-Chick electrolytes and probiotics in the water, and it gets changed every day. They are not on medicated chick starter, and I know it's hard to tell if they have coccidia, but all the poops look normal, no blood and not runny. Both birds that died had full crops. Maybe I should go back to the medicated feed, I really don't want any more chicks to die.