History: This is my second time raising chicks... I ordered 25 Easter Eggers from Meyer, they shipped 27, and one arrived DOA. Over the next two days, two weak ones died. The Problem: Today, the chicks are 4 weeks old, and I found a dead chick in the brooder (out in the shed). He was lying directly under the heat lamp on a fairly warm day. No exterior marks. His crop was completely empty. I don't trust my skills enough to get any information from an autopsy. I found him this afternoon, and he must have been dead for a few hours because rigor had set in. This morning, all the chicks were alive, healthy, eating, drinking, running around. They were not vaccinated against anything, nor are they on medicated feed. I haven't found any bloody poop, but that doesn't mean there isn't any; there is a lot of ground for them to cover as they're in a 10x10ft room. Questions: Any idea what this could be? Coccidiosis? Mareks? I just have no idea. Thanks for any advice.