This baby silkie chick was the third to hatch under my broody hen. All three looked dry, healthy and lively this morning at 10:00. Now it's 3:00 and one of them is dead. No injury marks on him, no sign of trauma. Why after fighting it's way through 21 days of incubation and having the strength to hatch out did it suddenly die????? Is there some bacteria or infection that can kill them that quickly? I changed all bedding and cleaned everything before hatch day. I couldn't bathe the broody, of course, but she's not sick at all and has incubated them faithfully. Now I'm worried about the other two that look healthy. Should I pull them out and separate into a brooder? Can anyone give me some possible causes? I don't know what to do.