The combs are bigger (like a male), but for 15 weeks not excessive for some breeds. Seems to be more male hackle feathers, but can’t see any saddle feathers. Angle of pic makes it hard to see the back and tail feathers very well. Overall I’m leaning toward male, but would like to see better pics of tail/back.
What breed? They have feathered feet, so are they Marans or another breed or a mix?