So sorry about the death of the 1st chick. You're right that there may have been something wrong with it. At least mama's taking good care of the other chick. She needs to stay on top of the egg, so she may just be gently disciplining the chick to stay where it's safe. Hopefully the 3rd egg will hatch today. Are you going to try adding some Sebrights?Well, what happened, is I put the chick back under the mama. In the house, it was barely moving, and I thought it might help to be returned to the stimulation of the nest. Mama tucked it under her and settled in. But about 3 hours later, I went out and found it dead beside her. I assume it was that one, but they are both black. It had no visible injuries, perhaps it just couldn't make it. Perhaps that's why it was rejected in the first place. The other chick was active and walking well, but whenever it came out, mama pecked it and made it go back in. I searched threads and read that some hens do this. I could see when she stood up a bit to let the baby in, there's still an unhatched egg. There was a big difference between the active chick and the one I tried to rescue, I saw after I had put it back.