I recently purchased two six month old black australorps from a private owner. Besides being all black they look different. One which just started laying is smaller and her eyes are totally black. The other one which is a lot bigger has a lighter comb and her eyes have brown around them. Can you tell if its the same breed by there eyes? And by size? I'm not sure that they are also the same age. I'm thinking the bigger one is older and may be a different breed. And what breed might she be? Sorry no pics but can anyone please help?