Why is my new hen still getting picked on?

[ksacres]

The first posted picture is of a Bantam Light Brahma-the second pics are of a Bantam Cochin. Brahmas (both standard and bantam) have pea combs, cochins (both standard and bantam) have single combs.

 

[plester01]

When I first bought them I thought they were both Cochins, after I got them home and got to see them closer I realized the one that is a Brahma was not a Cochin but at the time I did not know what kind it was. At least not until the nice folks on here told me what she was.