I guess I should have taken all the eggs away from the Leghorn that was sitting on 15 welsummer eggs. A few at a time she let the eggs die by moving around so much and not gathering them back up under her. On the day they were to hatch she had 5 left. The next day I went out to check and 4 were stone cold out of the nest. One had hatched and was peeping loudly. It was not under momma hen. So I put it under her and it got quite. Everything seemed ok. I went out later only to find she had beaten the chick nearly to death. I brought it in and revived it a little bit, but it died later that night. Lesson learned, don't let a leghorn hatch eggs.