We ordered and picked up 6 baby chick's back in March. The 2 RIRs are obvious , the 2 BRs are obvious, and only one of the Silver Lace is obvious. The other SL, not so much. This other one is mainly black with only the underfeathers being white. This one looks more like an Astralorp minus the white feathers underneath. Is it normal to have one SL be obvious with the white 'stripes' and one be mostly black? Thank you!