I went out to check because I knew chicks were starting to pip well the mother hens pecked at the newly hatched chick. I should add these are 2 broody Bantams sitting in the same nesting box sharing eggs and the eggs were put under them as soon as they went broody this is an olive Egger chick I also removed 2 others that are hatching and 5 more set to hatch in 8 days I left the Bantam 4 of their eggs. I have cleaned with vetinary iodine and put bacitracin on it. Any idea why hens would kill chick