Two of my hens have taken on the "mom" role for (so far) one chick. The chick hatched yesterday but I've noticed that the two moms have been pecking at her? They only do so when I get too close to the chick or if she starts to wander away. She doesn't seem to mind, never tries to run away and in fact, she nestles closer sometimes, is this normal? I haven't seen any blood, but should I separate the chick anyway? My birds have never been aggressive before, so maybe this is just something mother hens do? This is my first time hatching and their first time seeing a chick too.