Got 7 silkie chicks a couple months ago, lost two of them, the other 5 have been fun! Two of them are clearly not full silkies but we still like 'em. Thoughts on which ones are/could be roosters? We think the dark red one is but no crowing yet so we'll see.
At least one of your Silkie look like a cockerel, also the red one looks like a Cochin cockerel. The white one that isn't a Silkie looks like d'Uccle Pullet perhaps.