I have a mother hen who hatched many babies with two other hens in the same nest box. There were two eggs in an abandoned nest so I gave these eggs to the three broodies. All the hatchlings are light in color or brown but the two from the abandoned nest hatched out black. Two of the hens are being very mean. pecking the black ones. One of the darker hens does not peck and mothers the black colored babies but does not protect them. The problem is all three hens are together and still sitting on unhatched eggs. Is there any way to train the two mean hens to accept the black babies?