A friend got 2 young BR from a local auction. To my totally untrained eye (I've only had chickens myself for 4 months) they look to be about 10-12wks old. Both have undeveloped baby combs and no wattles to speak of. One of her "girls" seems to be developing a roo-looking tail, with one very long arched feather so far. The other has a blunt tail, so I'm pretty sure it's a pullet. Maybe it's my imagination, but the one with the tail also seems to have a more upright body posture. Do young BR pullets ever develop this sort of tail feather? Is there any way to determine if she has a rooster before he starts crowing?