Females have a distinct stripe on their head and with the males it's less distinct. Someone correct me if I'm wrong. Mothergoose may be able to help. I read somewhere she said she sexes her Welsummers at a week of age I believe.
From what I can remember one lady told me that you can tell by the colorings, if they are darker, they are females and lighter ones are males. Yet, I had both sexes in both colors in those chicks and it didnt matter whether they were light or dark colored. I guess it is due to different strains of Welsummers.
Gotta love those Wellies! Hope Mothergoose would reply to this one!
The brown patch on a females head will be darker and very distinct, while on the roos the brown spot will be kinda washed out and a little lighter looking. Kinda like one being in focus and the other a little fuzzy.