Silkie/Showgirl

[kgilmore1]

My showgirls and silkie are 7-8 weeks old now and I still have no clue on the sex. I’ve read a lot of tips but they really all look the same except for the reddish/buff one that stands tall like a cockerel. Here’s some pictures, it was a little breezy so they were hiding their necks a bit. And ignore the muddy feet, they trampled through the mud this morning.
Any thoughts on cockerel/pullet?