5 month old silkie cockerel or pullet?

[davogels]

Hi everyone This is my first post about our first chickens!!!!
We started with two silkies and one Wyandotte, all at 7 weeks old, but sadly one silkie didn't make it. We were pretty sure he was a roo since he could command the other two even in his weakened state. Our Wyandotte is looking very much like a hen and is the boss of the one I'm posting about. Because of that we assumed this one is a girl, but I've noticed a shimmer in the saddle feathers and the development of spurs on him/her.
Not a single egg or crow from either one of them!

So I was hoping y'all could help with the gender now that he/she will be 20 weeks in a few days. Thanks!!

 

[chickengr]

silkies are hard to tell. looks more like girl to me. silkies have 5 toes - I don't see any spur.

 

[davogels]

The spur is just a little knob I could feel on the back of each leg above the back toes. They could just be bumps, but they were in the same place on both legs. I am new to this so I really have no idea actually.