We have four chicks hatched out naturally by their moms. Two of them are 12 weeks old and on their own--in the flock with their mom, but mom is not caring for them any more----and two of them are 10 weeks old and mom is still taking care of them. Their father is a Speckled Sussex and their mothers are either Marans or a Black Austrolorp, so all the chicks are black. One chick has copper or red all down it's neck and chest. Two are raven black like the BA hen--and the other is a lighter shade of black with some white. Two of them have tail feathers that stick up--but, my BA hen looks like her tail feathers stick up too. So--are these roos or chcks? How long before I can know for certain?