I have a bantam that has hatched 3 eggs not hers they are 4 weeks old today . She takes very good care of them except i have been noticing that one of them has what looks like pecking places on both sides of its neck. And noew this morning I saw the banyam pecking at one of the other chicks next. Can someone tell me what is going on here and what I can do to stop this? Thanking you in advance. This is my first dealing with baby chicks.