little too soon, but here's what your looking for with the barring as they grow: Females will be noticeably darker, while the males will look noticeably lighter. Check in with us in a couple of weeks if you still have questions.
Looks like 2 pullets and a cockerel. Please start a new thread with 3 photos of each bird individually, in natural lighting. Show: top of head, side profile, and legs including front of shanks and feet.