Hi everyone, I am new to byc and chicken raising. We have 4 chicks approx. 12weeks old that our blk Australorp hatched from fertile eggs we bought. We were told eggs were some blue austs and some light sussex. Can you please help identify gender and breed. I can see the light sussex not sure if roo or pullet. The light grey which I believe is a roo is that a blue Australorp I didn't know they were that light he is very pretty. The two others I think they are blk aust although one is lighter and maybe they are pullets. The blk aust hen that went broody and hatched these had not stared laying when she went broody (6- 7mths old) and the other hen we got at same time has hardly laid and egg ive given them shellgrit and wormed them. I thought australorps were meant to be good layers. Thank you in advance.