Tim would be a much better hand at this than me, as I don't have this variety.
Seems to me to often people get in way to much of a hurry to try to judge their young stock. Sure, if they have some hideous defect, or obvious fault, and have no possibility of ever figuring into future breeding plans, those birds are out. Put down if needed, or more likely made available as a back yard layer, or eater, at one of our local little swaps. Other than that, I just keep an eye on them and keep shoveling them feed. As they grow, other things may become apparent (like a loose wing possibly, or obvious crow head), and down the road they go. If I keep doing this, I am getting down to the better birds, making room as they grow, saving a little feed. But it can be an easy mistake to be too hasty with these cuts, especially with the cockerels. Large fowl Brahma males go through some hideous stages as they mature. Most years I am pretty much convinced that there is not a single cockerel that will be worth the ton of feed that it has taken to get him to this gangly Ichabod Crane looking stage. Then one day you walk around the corner and see one and think well maybe, just maybe. What I'm trying to say is be patient and let them grow enough to be sure of what you got. Pullets usually don't surprise me near as often.
For example this #4 pullet looks to have potential, type wise, but she is still young. The things that catch my eye right off, is her tail. Her main tail feathers should be solid black, the tail coverts should be black with buff lacing. Her tail coverts look to be mostly split, buff above, and black below the shaft. No way to tell how her wings are marked, how her under color is. She has some extra dark ticking that may clean up some when she goes through a molt.
I think that is the one thing that I'm really learning and is also the one thing that is really hard to stick to. Give them a chance to grow up, unless of course you see something that is obvious. In the last flock that got killed by the dog, I swore that I didn't have one cockerel that would be worth feeding for more than it took to get them to the freezer. But they were coming along.....and I was beginning to see some sparks there right before they were killed.
I love the ugly stage....everyone that comes over to visit and stops by to see my birds always kind of go...."Oh, THIS is what you are spending so much time on" and they don't mean it in a kind way at all. It is funny though, one day they have all of the pin feathers sticking out of their necks and their wing feathers look like they went through the cement mixer and their backs are a fuzzy mess and then suddenly you look at them, they've cleaned up and you go...okay, this one might work for me. It is the reason I spend so much time just watching my chickens....looking for that one that makes me go "ah hah!".
is that one for sure a pullet? I have plans for her... She's gonna keep my backyard Dutch Bantams company. 
