I have a hen who is hatching 2 eggs as i type this. She started with 6 but not all made it, so I got one of my favorite breeds at the feed store today (Australorp) and tried to put her with the hen. Maybe this was a rookie mistake but the hen wanted to kill the chick. Will I have better luck trying to add her after the eggs have hatched? Has anyone successfully added chicks to a hatch? I'm worried she will attack her own chicks as well. Oh and she's pecking at the chick hatching Normal behavior?