I don't know her exact age but I was told that she should be a blue egg'er, but I would guess around 24 to 28 weeks????How old is your Sussex X?? I am wondering when my little cross beaked one will lay. I am hoping by the end of the month she will have caught up. Her comb is finally starting to develop. The BCM we got looks like she is just a month or so out too, her comb and wattles are just starting to gain some color. The replacement for our white EE roo is only 12 weeks so we likely won't be seeing anything from her for several months.