What breed or gender are these?

[RoostersAreAwesome]

Could you get a closer picture of the white one's saddle feathers?

 

[Tatokral]

Could you get a closer picture of the white one's saddle feathers?

Will these work?

 

[RoostersAreAwesome]

Will these work?

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All three are game cockerels. I just couldn't see this one's saddle feathers before.

I noticed that you were thinking about keeping all your roosters together. If you do, you might find this article helpful: https://www.backyardchickens.com/articles/rooster-flocks.72998/