Yikes, been wondering for a week or so on my 4 chicks. Now it's becoming more obvious that 2 are different. I have 2 BO and 2 EE. One of each type has nice developed lower back strip of feathers (2 on right) and the other 2 do not (2 on left). Also different in upper middle back feathers, shoulders, and front lapel. maybe one looks more rumpled than the others as the feather growth patterns differ (BO on the blue towel). What does this make them- male or female? all had long feathers that covered their body length by d3-5 and tail feathers. (they do seem to hold their tail feathers differently- more folded and less folded). Legs similar, EE definitely have tear drop shape, BO a little harder to tell. One of each is def bigger than the other with slightly different comb development (week 1 for a BO). head shape- maybe size difference or more fluff. I think I will go with sex linked next time, this first timer is so nervous about getting a roo.