What gives it away to you? The wattles haven't dropped on any of them? They just have larger combs and a bit larger tail feathers and thickers legs so I'm not 100%.
I believe the almost all gray is a pulley but not sure about the other two.
They're mixes of a gray Silkie and New Hampshire Red.
The white one has 5 toes and I think is a similar mix.
TIA