Ok so I ordered a straight run of chicks. 5 Easter egged and 5 assorted brown layers. This may be a silly question but as they grow how will I tell which is a roo and which is a hen. Based on looks? Or crow. And how soon will I be able to tell? May seem like a silly question but wasn't covered in the books I'm reading. Additionally how old should they be before they can be harvested for the frying pan for the Roos?