she is very nice , correct conformation .only problem I m having with her is her very late maturing type .that is a worry for me .you are rushing her , she has not proven her laying ability . you need to find out I think first .
if I was you I will not breed her yet .I will keep her penned with another pullets { not dark egg layer } for a company and watch how many eggs she will lay a week and how many is a duration of next 2 months .if she lay the 40 eggs expected for the breed ,than I will breed her , if she lay less than 40 in her next 2 months than she is not a breeder .except for showing .witch she will be good @ it .
the productivity of a breed as farm chooks has to be maintained .
you have many adult hens .proven breeders . and you have a gorgeous correct cockerels { Dark Angel } why not work with them first . they chicken will be bigger than a pullets .
this is my humble opinion . I want to help you breed well rounded good marans chooks .not just marans .
think about
chooks man
chooks man
I wonder if cold winter is the reason she started to lay late?