I have 6 week old Bielefedler pullets & 3 week old Bielefedler cockerels. I'm trying to decide which coops to put them in & I thought I read somewhere that the breed needed to be separated from other breeds to preserve the autosexing gene. Is this correct? I will have them separated when they're older & I would like to breed them, but do they need to be separated in the mean time? Thank you!!