I got these 2 mutt chickens 4/16 for my birthday. The lady that sold them to me said the black one is an Australorp mix (with what she didn't say) and the white and black one is ???. My questions are this, they should be 5-6 months old and don't seem to be laying eggs. The Australorp is HUGE! Could she be a he but not crowing? Do you think they are just younger than I think? I am feeding them grower with oyster shell and grit. Plenty of fresh water and a spacey coop/run. Any opinions would be helpful and what color do you think their eggs will be?